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.

18	20	24	32	48	80
19	A	B	C	D	E

 

What will come in place of ‘E’?

1. 80
2. 71
3. 91
4. 81
5. 65

Answer 1

Correct Answer - Option 4 : 81

The pattern of the original number series is

⇒ 18 + 2¹ = 20

⇒ 20 + 2² = 24

⇒ 24 + 2³ = 32

⇒ 32 + 2⁴ = 48

⇒ 48 + 2⁵ = 80

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

⇒ A = 19 + 2¹ = 21

⇒ B = 21 + 2² = 25

⇒ C = 25 + 2³ = 33

⇒ D = 33 + 2⁴ = 49

⇒ E = 49 + 2⁵ = 81

∴ The required number in place of E would be 81.