Find the one which does not belong to that group ?

Correct answer: B. 630

A. 30
B. 630
C. 10
D. 520

Explanation

630 is the only option divisible by 9 because its digit sum is 6 + 3 + 0 = 9, whereas the digit sums of 30, 10, and 520 are 3, 1, and 7. Thus 630 does not follow the common property. A student may choose 10 because it is the smallest number, which is irrelevant to divisibility.

Written and checked by Zahid Hussain, MS Computer ScienceLast updated 2 September 2026

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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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