General Intelligence Number Series Number Series Question #6556 (CAT-I)

Find the missing number in the sequence: 7, 12, 22, 42, 82, ?

A 173
B 162
C 183
D 143
Correct Answer & Explanation
Option B
• Pattern logic: Next term = Previous term × 2 - 2 7 × 2 - 2 = 14 - 2 = 12 12 × 2 - 2 = 24 - 2 = 22 22 × 2 - 2 = 44 - 2 = 42 42 × 2 - 2 = 84 - 2 = 82 82 × 2 - 2 = 164 - 2 = 162 • Alternatively, the differences are 5, 10, 20, 40, 80 (doubling each step): 82 + 80 = 162.