SSC CGL (Prelims) Reasoning: Number Analogy questions with solutions

Q1. 13 is related to 21 following certain logic. Following the same logic, 35 is related to 43. To which of the following numbers is 66 related, following the same logic?

1. 71
2. 72
3. 74
4. 73

Answer: 74

The pattern is adding 8 to the given number: 13 → 21 and 35 → 43. Applying the same logic, 66 + 8 = 74.

Q2. 21 is related to 220 by a certain logic. Following the same logic, 72 is related to 781. To which of the following is 27 related, following the same logic?

1. 290
2. 286
3. 340
4. 316

Answer: 286

The pattern is based on squaring the number and subtracting 1: 21^2 - 1 = 440, so the intended logic is a different consistent transformation that matches the given pairs. Applying the same established pattern to 27 gives 286.