Each question has four options. Three of them go together based on a common idea or rule. One is different. Identify the one that is different.
Show answer & explanation
Correct answer: A
Explanation
6 – 5
21 – 43
25 – 51
29 – 59
Pattern:
21 → 43 = (21 × 2) + 1
25 → 51 = (25 × 2) + 1
29 → 59 = (29 × 2) + 1
But,
6 → 5 ≠ (6 × 2) + 1 = 13
Hence, 6 – 5 is different from the other three.
Correct answer: (1) 6 – 5