Find the Missing Number in the series 1, 6, 13, 22, 33 ?
Correct answer: C. 46
- A. 36
- B. 40
- C. 46
- D. 52
Explanation
The successive differences are 5, 7, 9 and 11, increasing by 2 each time. The next difference is therefore 13, giving 33 + 13 = 46. The likely wrong choice is 40, which comes from failing to continue the increasing odd-difference pattern.
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Sequences describe ordered terms formed by a pattern, while series represent the sum of those terms. Questions cover arithmetic and geometric sequences, their nth terms, common difference or ratio, finite sums, and applications, with the sequence itself kept distinct from the corresponding series.
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