What are common examiner traps in Calculus?

Forgetting that local extrema on a closed interval can occur at boundary points where f'(x) ≠ 0, not only at interior critical points where f'(x) = 0. Failing to check both continuity (LHL = RHL = f(a)) and differentiability (LHD = RHD) when solving for piecewise parameters. Ignoring sign changes when splitting integrals containing absolute values like |x sin x|. Applying L'Hôpital's Rule when the limit is NOT in an indeterminate form 0/0 or ∞/∞. Assuming Newton-Raphson always converges, overlooking 2-cycles or oscillating loops. Overlooking the degree of exactness (Simpson's 1/3rd rule is exact for polynomials up to degree 3, Trapezoidal for degree 1). Missing logarithmic blowups as x → 0+ (e.g., ln(1/x) → +∞) when checking continuity at zero. Assuming f(x) is purely even rather than realizing f(x) + f(-x) simply filters out the odd-degree terms. Confusing the parities of g(x) - g(-x) (which extracts 2go(x) = 2fe'(x)) with g(x) + g(-x) (which extracts 2ge(x) = 2fo'(x)). Failing to reduce the polynomial degree by 1 after differentiation. Sign errors in complex unit division, e.g., confusing (-1)/(i) = i with -i. Forgetting the chain rule constant factor (e.g., 2i) in the denominator when integrating e2ix. Attempting lengthy trigonometric substitutions or rationalization instead of applying Euler's identity. Sign errors when taking the derivative of trigonometric terms (e.g., differentiating cos x vs sin x in product rule steps) Assuming symmetry properties (e.g., f(y) = f(2-y)) must hold for all points rather than existential relations guaranteed by IVT Confusing a local sample value with a global extrema (e.g., assuming f(1)=1 must be the absolute maximum on the interval) Forgetting to divide by 2 after adding I + I = 2I, leading to an answer that is double the correct value (e.g., picking 2 instead of 1). Incorrectly evaluating the width of the interval (b - a) when applying ab 1 dx. Sign errors when rearranging the functional equation f(x) = c - f(a+b-x) into f(x) + f(a+b-x) = c.

GATE CSE Calculus PYQs

Medium yield13.8% of Engineering Mathematics

Calculus in GATE CS tests single-variable differential and integral calculus, foundational limit evaluations, continuity and differentiability of piecewise/abso… Read the guide

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Questions: 40
Asked: since 2011
Total marks: 53
Marks / paper: 2

40 GATE CSE Calculus PYQs with solutions, from Engineering Mathematics. Browse all GATE CSE PYQs.

Questions

Every official paper that asked this topic, newest first.

GATE CSE 2026 Set 1 · Q32Consider the function $f\colon \mathbb{R} \to \mathbb{R}$ defined as follows: $f(x) = \begin{cases} c_1 e^x - c_2 \log_e\left(\frac{1}{x}\right), & \text{if } x > 0 \\ 3 & \text{otherwise} \end{cases}$ where $c_1, c_2 \in \mathbb{R}$ . If $f$ is continuous at $x = 0$ , then $c_1 + c_2 =$ _______ . (answer…NAT1 markEasySolve
GATE CSE 2026 Set 1 · Q46Let $f: \mathbb{R} \to \mathbb{R}$ be defined as follows: $f(x) = \left(\frac{|x|}{2} - x\right)\left(x - \frac{|x|}{2}\right)$ Which of the following statements is/are true?MSQ2 marksMediumSolve
GATE CSE 2026 Set 2 · Q27For a real number $a$ , let $I(a) = \int_{-1}^1 (3x^2 - ax + 1) \, dx$ . Which of the following statements is/are true?MSQ1 markEasySolve
GATE CSE 2026 Set 2 · Q64Consider a function $f\colon (0,1) \to \{0, 1\}$ defined as follows. For a real number $r \in (0,1)$ , $f(r) = 1$ if the second digit after the decimal point in $r$ is one of the four digits 2, 3, 6 and 7. Otherwise, $f(r)$ is equal to 0. The number of points in $(0,1)$ at which $f$ is discontinuous is…NAT2 marksMediumSolve
GATE CSE 2025 Set 1 · Q31Consider the given function $f(x)$ . $f(x) = \begin{cases} ax + b & \text{for } x < 1 \\ x^3 + x^2 + 1 & \text{for } x \ge 1 \end{cases}$ If the function is differentiable everywhere, the value of $b$ must be ________. (rounded off to one decimal place)NAT1 markEasySolve
GATE CSE 2025 Set 2 · Q12The value of $x$ such that $x > 1$ , satisfying the equation $\int_1^x t \ln t \, dt = \frac{1}{4}$ isMCQ1 markEasySolve
GATE CSE 2024 Set 1 · Q11Let $f\colon \mathbb{R} \to \mathbb{R}$ be a function such that $f(x) = \max\{x, x^3\}$ , $x \in \mathbb{R}$ , where $\mathbb{R}$ is the set of all real numbers. The set of all points where $f(x)$ is NOT differentiable isMCQ1 markMediumSolve
GATE CSE 2024 Set 2 · Q16Let $f(x)$ be a continuous function from $\mathbb{R}$ to $\mathbb{R}$ such that $f(x) = 1 - f(2 - x)$ Which one of the following options is the CORRECT value of $\int_0^2 f(x)dx$ ?MCQ1 markEasySolve
GATE CSE 2023 · Q28Let $f(x) = x^3 + 15x^2 - 33x - 36$ be a real-valued function. Which of the following statements is/are TRUE?MSQ1 markEasySolve
GATE CSE 2023 · Q31The value of the definite integral $\int_{-3}^{3} \int_{-2}^{2} \int_{-1}^{1} (4x^2y - z^3) \, dz \, dy \, dx$ is _________ . (Rounded off to the nearest integer)NAT1 markEasySolve
GATE CSE 2022 · Q34The value of the following limit is ________. $\lim_{x \to 0+} \frac{\sqrt{x}}{1 - e^{2\sqrt{x}}}$ NAT1 markEasySolve
GATE CSE 2021 Set 1 · Q20Consider the following expression. $\lim_{x \to -3} \frac{\sqrt{2x+22}-4}{x+3}$ The value of the above expression (rounded to 2 decimal places) is ________.NAT1 markEasySolve
GATE CSE 2021 Set 2 · Q25Suppose that $f\colon \mathbb{R} \to \mathbb{R}$ is a continuous function on the interval $[-3, 3]$ and a differentiable function in the interval $(-3, 3)$ such that for every $x$ in the interval, $f^{\prime}(x) \le 2$ . If $f(-3) = 7$ , then $f(3)$ is at most _______.NAT1 markEasySolve
GATE CSE 2020 · Q1Consider the functions I. $e^{-x}$ II. $x^2 - \sin x$ III. $\sqrt{x^3 + 1}$ Which of the above functions is/are increasing everywhere in $[0,1]$ ?MCQ1 markEasySolve
GATE CSE 2019 · Q13Compute $\lim_{x \to 3} \frac{x^4-81}{2x^2-5x-3}$ MCQ1 markEasySolve
GATE CSE 2018 · Q16The value of $\int_0^{\pi/4} x \cos(x^2)dx$ correct to three decimal places (assuming that $\pi = 3.14$ ) is ______.NAT1 markEasySolve
GATE CSE 2017 Set 1 · Q28The value of $\lim_{x \to 1} \frac{x^7 - 2x^5 + 1}{x^3 - 3x^2 + 2}$ MCQ2 marksEasySolve
GATE CSE 2017 Set 2 · Q10If $f(x) = R \sin \left(\frac{\pi x}{2}\right) + S$ , $f^{\prime}\left(\frac{1}{2}\right) = \sqrt{2}$ and $\int_0^1 f(x)dx = \frac{2R}{\pi}$ , then the constants $R$ and $S$ are, respectivelyMCQ1 markEasySolve
GATE CSE 2016 Set 1 · Q3 $\lim_{x \to 4} \frac{\sin(x-4)}{x-4} = \text{\underline{\hspace{2.2em}}} .$ NAT1 markEasySolve
GATE CSE 2016 Set 2 · Q2Let $f(x)$ be a polynomial and $g(x) = f^{\prime}(x)$ be its derivative. If the degree of $(f(x) + f(-x))$ is 10, then the degree of $(g(x) - g(-x))$ is ________.NAT1 markMediumSolve
GATE CSE 2015 Set 1 · Q4 $\lim_{x \to \infty} x^{1/x}$ isMCQ1 markEasySolve
GATE CSE 2015 Set 1 · Q5If $g(x) = 1-x$ and $h(x) = \frac{x}{x-1}$ , then $\frac{g(h(x))}{h(g(x))}$ is:MCQ1 markEasySolve
GATE CSE 2015 Set 1 · Q26 $\sum_{x=1}^{99} \frac{1}{x(x+1)} =$ __________.NAT1 markEasySolve
GATE CSE 2015 Set 1 · Q44 $\int_{1/\pi}^{2/\pi} \frac{\cos(1/x)}{x^2} dx =$ _________.NAT2 marksEasySolve
GATE CSE 2015 Set 3 · Q9The value of $\lim_{x \to \infty} (1 + x^2)e^{-x}$ isMCQ1 markEasySolve
GATE CSE 2015 Set 3 · Q45If for non-zero $x$ , $af(x) + bf\left(\frac{1}{x}\right) = \frac{1}{x} - 25$ where $a \neq b$ then $\int_1^2 f(x)dx$ isMCQ2 marksMediumSolve
GATE CSE 2015 Set 3 · Q50The velocity $v$ (in kilometer/minute) of a motorbike which starts from rest, is given at fixed intervals of time $t$ (in minutes) as follows: The approximate distance (in kilometers) rounded to two places of decimals covered in 20 minutes using Simpson's $1/3^{\text{rd}}$ rule is _________.NAT2 marksMediumDiagramSolve
GATE CSE 2014 Set 1 · Q6Let the function $f(\theta) = \begin{vmatrix} \sin \theta & \cos \theta & an \theta \\ \sin(\pi/6) & \cos(\pi/6) & an(\pi/6) \\ \sin(\pi/3) & \cos(\pi/3) & an(\pi/3) \end{vmatrix}$ where $\theta \in \left[\frac{\pi}{6}, \frac{\pi}{3}\right]$ and $f^{\prime}(\theta)$ denote the derivative of $f$ with respect to $\theta$ …MCQ1 markMediumSolve
GATE CSE 2014 Set 1 · Q46The function $f(x) = x \sin x$ satisfies the following equation: $f^{\prime\prime}(x) + f(x) + t \cos x = 0$ . The value of $t$ is _____.NAT2 marksEasySolve
GATE CSE 2014 Set 1 · Q47A function $f(x)$ is continuous in the interval $[0,2]$ . It is known that $f(0) = f(2) = -1$ and $f(1) = 1$ . Which one of the following statements must be true?MCQ2 marksMediumSolve
GATE CSE 2014 Set 2 · Q5A non-zero polynomial $f(x)$ of degree 3 has roots at $x = 1, x = 2$ and $x = 3$ . Which one of the following must be TRUE?MCQ1 markEasySolve
GATE CSE 2014 Set 2 · Q46In the Newton-Raphson method, an initial guess of $x_0 = 2$ is made and the sequence $x_0, x_1, x_2 \dots$ is obtained for the function $0.75x^3 - 2x^2 - 2x + 4 = 0$ Consider the statements (I) $x_3 = 0$ . (II) The method converges to a solution in a finite number of iterations. Which of the following is TRUE?MCQ2 marksMediumSolve
GATE CSE 2014 Set 3 · Q6If $\int_0^{2\pi} |x \sin x| \, dx = k\pi$ , then the value of $k$ is equal to _____.NAT1 markEasySolve
GATE CSE 2014 Set 3 · Q46With respect to the numerical evaluation of the definite integral, $K = \int_a^b x^2 \, dx$ , where $a$ and $b$ are given, which of the following statements is/are TRUE? I) The value of $K$ obtained using the trapezoidal rule is always greater than or equal to the exact value of the definite integral. II) The…MCQ2 marksMediumSolve
GATE CSE 2014 Set 3 · Q47The value of the integral given below is $\int_0^\pi x^2 \cos x \, dx$ MCQ2 marksEasySolve
GATE CSE 2013 · Q22Which one of the following functions is continuous at $x = 3$ ?MCQ1 markEasySolve
GATE CSE 2013 · Q23Function $f$ is known at the following points: The value of $\int_0^3 f(x)\,dx$ computed using the trapezoidal rule isMCQ1 markMediumDiagramSolve
GATE CSE 2012 · Q9Consider the function $f(x) = \sin(x)$ in the interval $x \in [\pi/4, 7\pi/4]$ . The number and location(s) of the local minima of this function areMCQ1 markMediumSolve
GATE CSE 2012 · Q28The bisection method is applied to compute a zero of the function $f(x) = x^4 - x^3 - x^2 - 4$ in the interval $[1,9]$ . The method converges to a solution after ______ iterations.MCQ2 marksEasySolve
GATE CSE 2011 · Q31Given $i = \sqrt{-1}$ , what will be the evaluation of the definite integral $\int_{0}^{\pi/2} \frac{\cos x + i \sin x}{\cos x - i \sin x}\, dx$ ?MCQ2 marksEasySolve

What GATE tests in Calculus

Concepts, patterns, formulas and traps distilled from past papers.

Calculus in GATE CS tests single-variable differential and integral calculus, foundational limit evaluations, continuity and differentiability of piecewise/absolute-value functions, and mean value theorems (Rolle's and LMVT). Earlier years (2012-2015) also included numerical methods such as Newton-Raphson, Bisection, and Trapezoidal/Simpson's rules, whereas recent papers (2020-2026) focus heavily on analytical properties: odd/even symmetry in single and multiple integrals, boundary extrema, points of non-differentiability, and MSQ-based structural analyses of functions.

Core concepts

Limits of indeterminate forms (0/0, infinity/infinity, infinity0)
Left-hand and right-hand limits, continuity, and differentiability at piecewise boundaries
Points of non-differentiability in functions with absolute values or max/min operators
Critical points, first and second derivative tests for local extrema
Endpoint (boundary) behavior and local extrema on closed intervals
Rolle's Theorem and Lagrange's Mean Value Theorem
Definite integration using substitution and integration by parts
Even/odd function symmetry properties in single, double, and triple integrals
Definite integrals with variable limits and integral equations
Numerical integration (Trapezoidal rule, Simpson's 1/3rd rule) and error characteristics
Newton-Raphson root finding, cycle detection, and convergence conditions
Even and odd polynomial decomposition
Properties of derivatives under function reflection (f(-x))
Degree reduction under polynomial differentiation
Definite integration of single-variable functions
Euler's formula and complex exponential representation
Fundamental Theorem of Calculus (substitution of limits)
Algebra of the imaginary unit i
Higher-order derivatives using the product rule
Linear combinations of derivatives and functions (differential relations)
Intermediate Value Theorem for continuous functions
Auxiliary function construction on transformed subintervals
Properties of definite integrals
King's property (reflection property ab f(x)dx = ab f(a+b-x)dx)
Linearity of definite integrals
Continuous functions and functional equations

Recurring question patterns

Indeterminate Limits and L'Hôpital's Rule
Commonmixed1 marks2022, 2021, 2019, 2017
Evaluating algebraic, trigonometric, or exponential limits evaluating to 0/0 or infinity/infinity using L'Hôpital's rule, variable substitution, or standard expansions.
Definite Integrals and Symmetry/Substitution
Commonmixed1 marks2026, 2025, 2023, 2018
Evaluating definite single, double, or triple integrals using integration by parts, substitution ( $u = 1/x$ , $u = x^2$ ), or leveraging odd/even symmetry over symmetric intervals $[-a, a]$ .
Continuity, Differentiability, and Parameter Matching
Commonmixed1 marks2026, 2025, 2024, 2013
Finding unknown constants or points of non-differentiability/discontinuity in piecewise functions, max/min combinations, or functions involving logarithmic singularities.
Extrema and Monotonicity Analysis
Occasionalmixed1 marks2026, 2023, 2020, 2012
Determining local maxima, local minima (including closed interval endpoints), or intervals where a given set of functions is strictly increasing using first and second derivatives.
Mean Value Theorems and Bounds
Occasionalmixed1 marks2021, 2014
Applying Lagrange's Mean Value Theorem (LMVT) or Rolle's Theorem to establish bounds on function values or prove existence of critical points.
Numerical Integration and Root Finding
OccasionalMCQ2 marks2015, 2014, 2013, 2012
Applying Simpson's 1/3rd rule, Trapezoidal rule, Newton-Raphson method, or Bisection method to discrete tabular data or analytical polynomials.
Parity Decomposition and Derivative Degree
RareNAT1 marks2016
Given symmetric or anti-symmetric combinations of a polynomial f(x) and its derivative g(x) = f'(x), determine the resulting degree or specific coefficient by decomposing f(x) into even and odd components.
Definite Integral with Euler Form Simplification
RareMCQ2 marks2011
Evaluating a definite integral whose integrand consists of complex trigonometric fractions that simplify neatly via Euler's identity $e^{ix} = \cos x + i \sin x$ .
Higher-Order Derivative Differential Relation Matching
OccasionalNAT2 marks2014
Given an explicit function f(x) involving products of algebraic and trigonometric functions, compute its first and second derivatives and solve for an unknown scalar parameter t that satisfies a linear combination f''(x) + f(x) + t*g(x) = 0.
Continuous Function Property via Intermediate Value Theorem
OccasionalMCQ2 marks2014
Given discrete point evaluations of a continuous function on a closed interval [a, b], identify which existence statement must hold by defining an auxiliary difference function (e.g., g(y) = f(y) - f(y+1)) and checking sign changes.
Definite Integral via King's Property and Functional Symmetry
CommonMCQ1 marks2024
Given a continuous function satisfying a functional symmetry relation $f(x) + f(a+b-x) = c$ over $[a, b]$ , students evaluate $\int_a^b f(x)\,dx$ by adding the integral to its reflected form ( $2I = \int_a^b c\,dx$ ).

Formulas GATE uses

L'Hôpital's Rule

\lim_{x \to a} \frac{f(x)}{g(x)} = \lim_{x \to a} \frac{f^{\prime}(x)}{g^{\prime}(x)}

Used when direct substitution yields indeterminate forms $0/0$ or $\pm\infty/\pm\infty$ .

Lagrange's Mean Value Theorem (LMVT)

f^{\prime}(c) = \frac{f(b) - f(a)}{b - a}, \quad c \in (a, b)

Used to establish maximum or minimum bounds for $f(b)$ given bounds on $f^{\prime}(x)$ on a closed interval $[a, b]$ .

Integration by Parts

\int u \, dv = u v - \int v \, du

Used to evaluate integrals of products of polynomial, logarithmic, or trigonometric functions.

Odd Function Definite Integral Symmetry

\int_{-a}^a f(x) \, dx = 0 \quad \text{if } f(-x) = -f(x)

Used to simplify single and multi-variable symmetric integrals where components are odd.

Trapezoidal Rule

\int_{x_0}^{x_n} f(x)\,dx \approx \frac{h}{2}\left[f(x_0) + f(x_n) + 2\sum_{i=1}^{n-1} f(x_i)\right]

Used to numerically approximate definite integrals over equally spaced tabular points.

Simpson's 1/3rd Rule

\int_{x_0}^{x_n} f(x)\,dx \approx \frac{h}{3}\left[f(x_0) + f(x_n) + 4\sum_{\text{odd } i} f(x_i) + 2\sum_{\text{even } i} f(x_i)\right]

Used for numerical integration across an even number of subintervals with step size $h$ .

Newton-Raphson Iteration

x_{n+1} = x_n - \frac{f(x_n)}{f^{\prime}(x_n)}

Used to compute successive root approximations and check convergence or oscillation.

Even-Odd Function Decomposition

f(x) = f_e(x) + f_o(x), \quad f(x) + f(-x) = 2f_e(x), \quad f(x) - f(-x) = 2f_o(x)

Used when separating a polynomial into strictly even-degree and odd-degree components.

Derivative Parity Rule

\frac{d}{dx}[f_e(x)] = f_e^{\prime}(x) \text{ (odd)}, \quad \frac{d}{dx}[f_o(x)] = f_o^{\prime}(x) \text{ (even)}

Used to determine the parity and resulting combinations of derivatives $g(x) \pm g(-x)$ .

Degree of a Polynomial Derivative

\text{degree}(P^{\prime}(x)) = \text{degree}(P(x)) - 1 \quad (\text{for } \text{degree}(P) \ge 1)

Used to compute the degree of differentiated polynomial terms.

Euler's Formula

e^{ix} = \cos x + i \sin x, \quad e^{-ix} = \cos x - i \sin x

Used to convert trigonometric expressions involving $i$ into exponential form for simplified integration.

Integration of Exponential with Constant Multiplier

\int e^{kx}\,dx = \frac{e^{kx}}{k} + C

Used to integrate the simplified complex exponential function.

Properties of the Imaginary Unit

\frac{1}{i} = -i, \quad e^{i\pi} = -1

Used to simplify the final definite integral result after substituting the upper and lower limits.

Product Rule of Differentiation

\frac{d}{dx}[u(x)v(x)] = u^{\prime}(x)v(x) + u(x)v^{\prime}(x)

Used to compute successive derivatives of products such as $f(x) = x \sin x$ .

Intermediate Value Theorem (IVT)

\text{If } g \text{ is continuous on } [a,b] \text{ and } g(a) \cdot g(b) < 0, \text{ then } \exists c \in (a,b) \text{ such that } g(c) = 0

Used to prove the existence of points where $f(y) = f(y+1)$ by evaluating the sign of $g(y) = f(y) - f(y+1)$ at interval endpoints.

King's Rule of Definite Integrals

\int_a^b f(x)\,dx = \int_a^b f(a + b - x)\,dx

Used when the integrand exhibits symmetry around the midpoint $\frac{a+b}{2}$ , or when a relation between $f(x)$ and $f(a+b-x)$ is given.

Integral Evaluation via Symmetry Sum

I = \frac{1}{2} \int_a^b \big[f(x) + f(a+b-x)\big]\,dx = \frac{c(b-a)}{2} \quad \text{if } f(x) + f(a+b-x) = c

Direct evaluation shortcut when $f(x) + f(a+b-x)$ is a known constant $c$ over $[a, b]$ .

Examiner traps in Calculus

Forgetting that local extrema on a closed interval can occur at boundary points where f'(x) ≠ 0, not only at interior critical points where f'(x) = 0.
Failing to check both continuity (LHL = RHL = f(a)) and differentiability (LHD = RHD) when solving for piecewise parameters.
Ignoring sign changes when splitting integrals containing absolute values like |x sin x|.
Applying L'Hôpital's Rule when the limit is NOT in an indeterminate form 0/0 or ∞/∞.
Assuming Newton-Raphson always converges, overlooking 2-cycles or oscillating loops.
Overlooking the degree of exactness (Simpson's 1/3rd rule is exact for polynomials up to degree 3, Trapezoidal for degree 1).
Missing logarithmic blowups as x → 0+ (e.g., ln(1/x) → +∞) when checking continuity at zero.
Assuming f(x) is purely even rather than realizing f(x) + f(-x) simply filters out the odd-degree terms.
Confusing the parities of g(x) - g(-x) (which extracts 2go(x) = 2fe'(x)) with g(x) + g(-x) (which extracts 2ge(x) = 2fo'(x)).
Failing to reduce the polynomial degree by 1 after differentiation.
Sign errors in complex unit division, e.g., confusing (-1)/(i) = i with -i.
Forgetting the chain rule constant factor (e.g., 2i) in the denominator when integrating e2ix.
Attempting lengthy trigonometric substitutions or rationalization instead of applying Euler's identity.
Sign errors when taking the derivative of trigonometric terms (e.g., differentiating cos x vs sin x in product rule steps)
Assuming symmetry properties (e.g., f(y) = f(2-y)) must hold for all points rather than existential relations guaranteed by IVT
Confusing a local sample value with a global extrema (e.g., assuming f(1)=1 must be the absolute maximum on the interval)
Forgetting to divide by 2 after adding I + I = 2I, leading to an answer that is double the correct value (e.g., picking 2 instead of 1).
Incorrectly evaluating the width of the interval (b - a) when applying ab 1 dx.
Sign errors when rearranging the functional equation f(x) = c - f(a+b-x) into f(x) + f(a+b-x) = c.

How questions are asked

Evaluate limit of indeterminate expression
Determine points of non-differentiability or discontinuity
Find unknown parameter to enforce continuity/differentiability
Identify true/false statements about local extrema via MSQ
Evaluate definite integral using substitution or integration by parts
Evaluate multiple integral via symmetry/odd function cancellation
Compute bound using Lagrange's Mean Value Theorem
Evaluate definite integral from discrete table via Trapezoidal/Simpson's rule
Simulate iterations of Newton-Raphson or Bisection method
Find degree of derivative/functional combination (NAT)
Definite integral evaluation with trigonometric and complex algebraic terms
Direct parameter evaluation from a differential equation identity (NAT)
Deductive truth verification for continuous function intervals (MCQ)
Definite integral of an implicit function satisfying a functional identity
Direct evaluation MCQ with simple integer options

Paper trends

Shift away from traditional numerical methods (Bisection, Simpson's, Trapezoidal) toward rigorous analytical questions on continuity, differentiability of piecewise/max functions, and MSQ-style multi-statement verification.
2026, 2025, 2024, 2023, 2022, 2021, 2020
Increase in NAT and MSQ questions testing edge-case analysis, such as odd function cancellation in multiple integrals or continuity behavior of derivatives.
2026, 2025, 2024, 2023, 2021
Heavy proportion of 1-mark foundational questions focusing on clean analytical evaluations (limits, substitutions, parameter matching).
2026, 2025, 2022, 2021, 2020, 2019, 2018, 2017, 2016
Appeared as a conceptual 1-mark NAT question focusing on the interplay between polynomial degrees, parity, and the derivative operator.
2016
In the provided set, integration appears as an algebraic/identity-driven problem in 2011, testing 2-mark conceptual simplification rather than heavy numerical approximations.
2011
Questions are split between symbolic mechanical differentiation evaluated via NAT and proof-like existential deduction evaluated via 4-option MCQ.
2014
Introduction of conceptual, functional equation-driven 1-mark definite integral questions that reward property recognition over algebraic heavy-lifting.
2024

Difficulty notes

Easy: Direct limit evaluations via L'Hôpital's Rule, standard 1-step substitution integrals, polynomial second derivative test for extrema, and piecewise parameter matching with linear/polynomial equations. Medium: Extrema including boundary points on closed intervals, differentiability analysis of composite max/min/absolute value functions, multi-step integration by parts with variable bounds, triple integrals requiring odd/even decomposition, counting discontinuity points in decimal-digit functions, and multi-statement MSQs analyzing higher-order derivatives.