Discussion
The sequence below breaks off before its final term. Discover the pattern and state the value the question mark conceals.
8, 15, 24, 35, 48, ?
Answer: C
Correct answer: 63
The gaps are not equal: they run 7, 9, 11, 13, each 2 more than the last. The next gap must therefore be 15, and adding it to the final term, 48 plus 15 is 63. As a check, the gap between the answer and 48 is 15, which continues the run of gaps 7, 9, 11, 13 by a further 2. Checking parity, whether the terms are odd or even, often eliminates options before any arithmetic is done.
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