CSAT (Aptitude)·MCQ Practice

Coding and Decoding — MCQ Practice

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Version 1Updated 6 Mar 2026

Interactive MCQ Practice

Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.

Q1easy

In a certain code, 'MASTER' is written as 'NBTUFS'. How is 'TIGER' written in that code?

Q2medium

If 'DOG' is coded as 26, and 'CAT' is coded as 24, then 'FOX' is coded as?

Q3medium

In a certain code language, 'pit na som' means 'bring me water', 'na jo tod' means 'water is life', and 'jo li pit' means 'life and water'. Which word in that language means 'is'?

Q4medium

If 'RED' is coded as 6720, and 'GREEN' is coded as 795513, then 'BLUE' is coded as?

Q5easy

In a code, 'light' means 'dark', 'dark' means 'heavy', 'heavy' means 'soft', 'soft' means 'hard'. What is the opposite of 'light'?

Q6hard

If the digits 1-5 are coded as A-E respectively. Conditions: (i) If the number is odd, add 1 to its code. (ii) If the number is even, subtract 1 from its code. (iii) If the number is 0, code it as Z. Code '123'.

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