Find the one which does not belong to that group ?
Correct answer: A. 27
- A. 27
- B. 37
- C. 47
- D. 67
Explanation
37, 47, and 67 are prime numbers, while 27 is composite because 27 = 3 x 9. Thus 27 is the only number that has factors other than 1 and itself. A student may choose 67 because it is the largest option, but magnitude is unrelated to primality.
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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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