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1. Which one of the following is the next number in the series : 7, 7, 14, 42, 168-----?
- A. 336
- B. 336
- C. 336
- D. 336
Answer: Option D
Explanation:
7 × 1 = 7;7 × 2 = 14; 14 × 3 = 42; 42 × 4 = 168; 168 × 5 = 840
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