Question

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?   

Options

• 215

• 143

• 247

• 91

Answer 1

215

Explanation:

Except 215, all others are multiples of 13.

143 = 13 × 11; 247 = 13 ×19;

91 = 13 × 7; 65 = 13 × 5

But, 215 = 13 × 16.53