Find the one which does not belong to that group ?
Correct answer: B. 4
- A. 3
- B. 4
- C. 5
- D. 9
Explanation
3, 5, and 9 are odd numbers, but 4 is even because it is divisible by 2. Therefore, 4 does not follow the common odd-number property. A student may choose 9 because it is a perfect square, overlooking that 4 is also a perfect square.
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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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