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Number Representation and Arithmetic

GATE CSE 2023 · Q32

NAT1 markEasy

Time

A particular number is written as 132132 in radix-4 representation. The same number in radix-5 representation is __________.

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Solution

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Official answer: 110 (±0)

Number Representation and Arithmetic

To convert the number (132)4(132)_4 to radix-5 representation, first convert it to base-10 (decimal):

(132)4=(1×42)+(3×41)+(2×40)(132)_4 = (1 \times 4^2) + (3 \times 4^1) + (2 \times 4^0)
(132)4=16+12+2=3010(132)_4 = 16 + 12 + 2 = 30_{10}

Next, convert 301030_{10} to radix-5 by successive division by 55:

  • 30÷5=630 \div 5 = 6 with remainder 00 (least significant digit)

  • 6÷5=16 \div 5 = 1 with remainder 11

  • 1÷5=01 \div 5 = 0 with remainder 11 (most significant digit)

Reading the remainders from most significant to least significant gives:

(30)10=(110)5(30)_{10} = (110)_5

Hence, the number in radix-5 representation is 110.

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This Number Representation and Arithmetic previous year question is Q32 of the GATE CSE 2023 paper. Find more GATE CSE PYQs on Number Representation and Arithmetic in Digital Logic, or browse all GATE CSE PYQs.

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Number Representation and Arithmetic in GATE CSE

Number Representation and Arithmetic has 33 GATE CSE PYQs across 20 papers from 2012 to 2026. 11 of them are 1-mark NAT questions like this one, and GATE CSE 2023 has 2.

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A particular number is written as 132 in radix-4 representation. The same number in radix-5 representation is …

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