Find the one which does not belong to that group ?
Correct answer: D. 57
- A. 41
- B. 43
- C. 53
- D. 57
Explanation
41, 43, and 53 are prime numbers because each has no divisor other than 1 and itself. 57 is composite because 57 = 3 x 19. A student may choose 53 because it is the largest prime listed, but its size does not affect whether it is prime.
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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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