Question

In the following question, a number series is given, after the number series, a number and then A, B, C, D and E are given. Compete the number series starting from the given number based on the pattern of the original number series and choose correct option.

30	31	64	195	784	3925
19	A	B	C	D	E

 

What will come in place of ‘E’?

1. 2505
2. 2615
3. 2605
4. 3925
5. 2600

Answer 1

Correct Answer - Option 3 : 2605

The pattern of the original number series is

⇒ 30 × 1 + 1 = 31

⇒ 31 × 2 + 2 = 64

⇒ 64 × 3 + 3 = 195

⇒ 195 × 4 + 4 = 784

⇒ 784 × 5 + 5 = 3925

According the pattern of the above series the number series starting from the given number would be as:

⇒ A = 19 × 1 + 1 = 20

⇒ B = 20 × 2 + 2 = 42

⇒ C = 42 × 3 + 3 = 129

⇒ D = 129 × 4 + 4 = 520

⇒ E = 520 × 5 + 5 = 2605

∴ The required number in place of E would be 2605.