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

In a certain code, each letter is replaced by its opposite letter in the alphabet (A↔Z, B↔Y, C↔X, and so on). How will the word TRADE be written in this code?

TRADE is coded as GIZWV. Each letter is replaced by its mirror letter, found by subtracting its position from 27: T becomes G, R becomes I, A becomes Z, D becomes W and E becomes V.

  1. AGIZWVCorrect
  2. BGIZVW
  3. CHJZWV
  4. DGIAWV

Explanation

The opposite of a letter with position n is the letter at position 27−n. T(20)→G(7), R(18)→I(9), A(1)→Z(26), D(4)→W(23), E(5)→V(22). So TRADE becomes GIZWV. GIZVW swaps the last two letters.

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