Which number will replace the question mark (?) in the series given below? 1,…
2023
Which number will replace the question mark (?) in the series given below?
1, 3, 6, 10, 15, 21, ?, 36, ......
Answer: B. 28 — The series consists of triangular numbers where each term increases by an incrementing integer value. The differences between consecutive terms are 2, 3, 4,…
- A.
32
- B.
28
- C.
29
- D.
30
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Correct answer: B
The series consists of triangular numbers where each term increases by an incrementing integer value. The differences between consecutive terms are 2, 3, 4, 5, and 6 respectively. To find the missing number after 21, we add 7 to get 28. The following term in the sequence is 36, which confirms that adding 8 to 28 yields the correct result.
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