Multiple choice

Find the missing term in the following number series. 10, 5, 5, ?, 40

  1. 15

  2. 20

  3. 25

  4. 10

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

The pattern is: ×0.5, ×1, ×2, ×4 (each multiplication doubles). 10 × 0.5 = 5, 5 × 1 = 5, 5 × 2 = 10, 10 × 4 = 40. The missing term is 10. Options A (15), B (20), and C (25) don't fit this pattern.