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CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out

In a certain code language, each letter is replaced by the number equal to double its position in the alphabet (A=1, B=2, and so on). If MAT is coded as 26-2-40, how will RICE be coded?

RICE is coded as 36-18-6-10. The rule doubles each letter's alphabet position: R (18) becomes 36, I (9) becomes 18, C (3) becomes 6 and E (5) becomes 10. The MAT example confirms this, since 13, 1 and 20 become 26, 2 and 40.

  1. A36-18-6-10Correct
  2. B18-9-3-5
  3. C36-18-6-12
  4. D34-18-6-10

Explanation

Double each position: R=18 gives 36, I=9 gives 18, C=3 gives 6, E=5 gives 10. The code is 36-18-6-10. Check with MAT: M=13 gives 26, A=1 gives 2, T=20 gives 40. Option 18-9-3-5 forgets to double the values.

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