Find the next number in the series: 5, 10, 20, 40, ____?
- 70
- 80
- 100
- None of these
Explanation
Pattern: x2 each time
5 x 2 = 10
10 x 2 = 20
20 x 2 = 40
40 x 2 = 80
Last verified on 11-10-2026
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