Coding-decoding MCQ — 14 Practice Questions with Answers

Explanation

The coding is based on alphabet positions. In each coded pair, the sums of corresponding letters are fixed: C and T make 23, E and S make 24, and G and R make 25. The same pattern fits FHJ to QPO: F and Q make 23, H and P make 24, and J and O make 25. For IKM, I needs N to make 23, K needs M to make 24, and M needs L to make 25. Therefore the required code is NML; NOL, NOM, and MLN break this position-sum pattern.

Explanation

The code assigns a fixed digit to each letter. From PARK, P = 5, A = 3, R = 9 and K = 4. From SHIRT, S = 1, H = 7, I = 6 and T = 8. From PANDIT, N = 2 and D = 0 are also confirmed, while P, A, I and T repeat consistently. Therefore NISHAR becomes N = 2, I = 6, S = 1, H = 7, A = 3, R = 9, giving 261739. The other numbers break one or more of these fixed letter-digit mappings.

Explanation

The code uses the alphabetic position of each letter, reduced to a single digit by adding the digits when needed: t is 20, so 2; h is 8; r is 18, so 9; e is 5; a is 1. That gives threat as 289512. Applying the same rule to BRIDGESTONE gives 2, 9, 9, 4, 7, 5, 1, 2, 6, 5, 5, which forms 29947512655. The other numbers break this pattern at one or more letters.

Explanation

Compare the coded groups by common words. The word 'good' appears in the first, second and fourth statements; the common code there is 4. The word 'he' is then 1, and 'be' is 2. 'Must' is common to the second and third statements, so it is 9. 'Money' is common to the first and third statements, so it is 6. 'Save' is common to the third and fourth statements, so it is 8. In 'must save some money', the remaining code is 7, which belongs to 'some'.

Explanation

The code assigns a fixed symbol to each letter from the given examples. From MINERAL written as QRSTUVW, R is coded as U, E as T and A as V. From SOUND written as ABCSD, D is coded as D. Therefore READER becomes R-E-A-D-E-R, that is U-T-V-D-T-U. TUDVUT changes the first and third coded letters, SFBEFS follows a simple next-letter idea that is not the given code, and QDZCDQ uses symbols not supported by the examples.