Discussion
This sequence has been cut off before its last term. Settle on the rule the terms obey and give the next number.
12, 24, 48, 96, ?
Answer: D
Correct answer: 192
The terms are multiplied rather than added to. Dividing each by its predecessor gives the same result throughout: 24 over 12 is 2, and 48 over 24 is 2, so the ratio is 2. Multiplying the last term, 96 times 2 is 192. As a check, dividing the answer by 2 returns 96, which is the last term shown. Every question in this topic can be answered from the terms shown, with no outside knowledge required.
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