Correct option is D
Given:
9 → 90, 12 → 156
72 → ?
Logic: Add 1 to the given number and then multiply it by the number itself to get its related number.
9 → 90
9 × (9 + 1) = 9 × 10 = 90
12 → 156
12 × (12 + 1) = 12 × 13 = 156
Check each option:
Option A: 6 → 6 × (6 + 1) = 6 × 7 = 42 ≠ 72
Option B: 9 → 9 × (9 + 1) = 9 × 10 = 90 ≠ 72
Option C: 7 → 7 × (7 + 1) = 7 × 8 = 56 ≠ 72
Option D: 8 → 8 × (8 + 1) = 8 × 9 = 72
So, the number 72 is related to is 8.
Thus, the correct option is: (d)
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