Find the missing number in the series3, 7, 16, 35, ?, 153
Correct answer: B. 74
- A. 84
- B. 74
- C. 78
- D. 63
Explanation
The pattern is to multiply by 2 and then add a sequentially increasing number (×2+1, ×2+2, ×2+3, ...). So, 7 = 3×2+1; 16 = 7×2+2; 35 = 16×2+3. The missing term is 35×2+4 = 74.
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