Question

Find the missing number in the following number series: 4, 17, 34, 53, 76, ?
(A) 105
(B) 85
(C) 95
(D) 103

Answer 1

103 is the missing number in the following number series. The number series are used to find the next numbers found in the given series.

Here, 103 is the right answer and then insert missing number quickly.

It is making the series right when compare with numbers divisible by 4. You can square and cubic the series to get 103 as the answer.

Answer 2

Given that the number series is = 4, 17, 34, 53, 76

Find the difference between the numbers:

Difference of 4 and 17 = 13

Difference of 17 and 34 = 17

Difference of 34 and 53 = 19

Difference of 53 and 76 = 23

Observe and conclude the next difference:

We can observed that the difference in the numbers is a series of consecutive prime numbers

Therefore, the next difference will be the next prime number that comes after 23, which is 29

Find the next number:

76 + 29 = 105

Answer: The next number is 105