Question

Pick the odd one out: 5-15-20, 10-30-40, 4-12-15, 25-50-75 ( A ) 25-50-75 ( B ) 4-12-15 ( C ) 10-30-40 ( D ) 5-15-20

Answer 1

Step-by-step explanation:

4-12-15 is the odd one...

Answer 2

The required "option (B) 4 - 12 - 15" is correct.

Step-by-step explanation:

We have,

5 - 15 - 20, 10 - 30 - 40, 4 - 12 - 15 and 25 - 50 - 75

To pick the odd one out = ?

∴ 5 - 15 - 20

5, 3 × 5, 4 × 5

10 - 30 - 40

10, 3 × 10, 4 × 10

4 - 12 - 15

4, 3 × 4, 15 is not multiple of 4.

25 - 50 - 75

25, 2 × 25, 3 × 25

Thus, the required "option (B) 4 - 12 - 15" is correct.