Number series · solved example
Find the next term: 5, 10, 20, 40, ?
- 60
- 70
- 80Correct
- 90
Solution
Each term doubles the previous one: 5 × 2 = 10, 10 × 2 = 20, 20 × 2 = 40, so the next term is 40 × 2 = 80. This is a simple geometric progression with ratio 2.