Find the next number in the series: 3, 6, 12, 24, ?
- A. 30
- B. 36
- C. 48
- D. 60
Explanation
Each term is double the one before it, so the next term is 24 times 2, which is 48. Checking a series for a constant ratio before looking for a constant difference saves time, since a rapidly growing series is almost always multiplicative. The answer 30 comes from assuming a difference of 6.
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