Q1. Which of the following options is different from the others?
Explanation
In three number groups, the middle number is twice the sum of the first and third numbers. For (5, 18, 4), (5 + 4) × 2 = 18. For (9, 22, 2), (9 + 2) × 2 = 22. For (9, 30, 6), (9 + 6) × 2 = 30. But in (7, 56, 4), the same rule gives (7 + 4) × 2 = 22, not 56. Hence (7, 56, 4) is the group that differs from the others.
