Question

Find find the odd man out 15 21 63 81 69

Answer 1

Answer:

All the numbers are divisible by 3 and all the numbers are odd.

Step-by-step explanation:

But, the number starts odd in 15.In another numbers it starts with even number. so, answer is 15.

Hope it helps.

Answer 2

Concept:

Let's recall the definition of odd numbers and perfect squares.

Odd numbers are the numbers which are not divisible by 2.

Perfect squares are the numbers from the number system which can be expressed as the squares of some numbers from the same system.

Given:

We are given the numbers 15, 21, 63, 81, 69

To find:

We are asked to find the odd one out of the given numbers

Solution:

The numbers 15, 21, 63, 81, and 69 are all divisible by 3. On dividing by 3, they all give 0 as the remainder.

The numbers are also odd numbers as they are all not divisible by 2.

But 81 is the only number among them which is a perfect square. It is the perfect square of 9, since 9x9=81

Hence,

81 is the odd one out of the numbers given.