Question

What should come in place of the question mark (?) in the given series? 451 450 447 442 ? 426

• A. 435
• B. 431
• C. 437
• D. 433

Answer 1

Answer:

A. 435

Look at the differences between terms:

• 451 → 450 = −1

• 450 → 447 = −3

• 447 → 442 = −5

The pattern is subtracting consecutive odd numbers: 1, 3, 5, 7, 9

Continue:

• 442 − 7 = 435

• 435 − 9 = 426 (matches given)

  Final Answer: 435