Multiple choice

A series is given with one term missing. Find the number in place of the question mark to complete the series. 5, 10, 13, 52, 57, ?

  1. 256

  2. 536

  3. 342

  4. 390

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series follows the pattern: +5, ×3, +4, ×4, +5, ×3. Let's verify: 5 + 5 = 10, 10 + 3 = 13 (but this gives 13, not ×3). Let me recalculate. Actually: 5 to 10: +5 or ×2. 10 to 13: +3. 13 to 52: ×4. 52 to 57: +5. The pattern is: ×2, +3, ×4, +5, ×6. So 57 × 6 = 342. This matches option C. The pattern alternates between multiplication and addition, with operands increasing by 1 each time: ×2, +3, ×4, +5, ×6.