Question

5,9,13,17,?,57,157
complete the series

Answer 1

may be the answer is 53 if I am not wrong than

Answer 2

Answer:

53

Step-by-step explanation:

It's a combination of 2 series-

i) 5, 13, _, 157

ii) 9, 17, 57

The difference between first 2 numbers in each series is (13-5) = (17-9) = 8

The difference between 3rd and fourth number in 2nd series is (57-17) = 40

So the difference between 4th and 3rd numbers in 1st series will also be 40

So the 4th number in the first series is (13+40) = 53.