### IBPS RRB PO 2018 Question 5

Instructions

In each of these questions, a number series is given. Only one number is wrong in each series. You have to find out the wrong number

Question 5

# 2 3 11 38 102 229 443

Solution

$$3-2 = 1 = 1^3$$
$$11-3 = 8 = 2^3$$
$$38 -11 = 27 = 3^3$$
$$102-38 = 64 = 4^3$$
$$229-102 = 127 \neq 5^3$$
But $$227-102 = 125 = 5^3$$
$$443-227 = 216 = 6^3$$

229 is the wrong number