Find the number that can replace question mark (?) in the series given below.…

2025

Find the number that can replace question mark (?) in the series given below. 7, 12, 32, 122, ?, 3602, 25202

  1. A.

    602

  2. B.

    610

  3. C.

    702

  4. D.

    622

Attempted by 18 students.

Show answer & explanation

Correct answer: A

The series follows a pattern where each term is multiplied by an incrementing integer and then reduced by an increasing even number.

7 × 2 - 2 = 12

12 × 3 - 4 = 32

32 × 4 - 6 = 122

122 × 5 - 8 = 602

Verification: 602 × 6 - 10 = 3602

Thus, the missing number is 602.

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