Question

What should come in place of the question mark '?' in the following number series?

38, 43, 215, 220, 1100, ?
1. 5500
2. 1105
3. 1210
4. 6600
5. 1320

Answer 1

Correct Answer - Option 2 : 1105

Calculation∶

The series follows following pattern∶

⇒ 38 + (2² + 1) = 43

⇒ 43 × (2² + 1) = 215

⇒ 215 + (2² + 1) = 220

⇒ 220 × (2² + 1) = 1100

⇒ 1100 + (2² + 1) = 1105

∴ The value of ? is 1105