Question

In the following series of numbers, find out how many times 1, 3 and 7 have appeared together, 7 being in the middle, 1 and 3 on either side of 7? 2970173771331738571377173906
(A) 3
(B) 4
(C) 5
(D) more than 5

Answer 1

hey mate here is your answer

option A. 3 times

hope it helps you