UPSC Prelims 2017·CSAT·Logical Reasoning·Coding Decoding

In a certain code, '256' means 'red colour chalk', '589' means 'green colour flower' and '254' means 'white colour chalk'. The digit in the code that indicates 'white' is

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Last updated 23 May 2026, 3:31 pm IST
  1. A2
  2. B4Correct
  3. C5
  4. D8

Explanation

Explanation: 1. Compare the first and third statements: '256' means 'red colour chalk' '254' means 'white colour chalk' The common words are 'colour' and 'chalk'. The common digits are '2' and '5'. This means '2' and '5' represent 'colour' and 'chalk' (in some order). 2. In the third statement, '254' means 'white colour chalk'. Since '2' and '5' represent 'colour' and 'chalk', the remaining digit '4' must represent the remaining word 'white'. Therefore, the digit that indicates 'white' is 4. The final answer is B) 4.
Logical Reasoning: In a certain code, '256' means 'red colour chalk', '589' means 'green colour flower' and '254' means 'white colour chalk

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