Question

find out the odd one 15:63,22:91,23:95,31:97​

Answer 1

$\huge\blue{Heyy}$

$\huge\sf\red{Answer is :-}$

$<marquee>23:95</marquee>$

Answer 2

15:63 is the odd one out in 15:63,22:91,23:95,31:97​ as this pair is not coprime while ll other pairs are co prime.

Given:

15:63, 22:91, 23:95, 31:97​

To Find:

Odd one out

Solution:

Co-prime numbers are the numbers which do not have any factor common other than 1.

HCF of coprime number is 1

Step 1:

Find HCF of 15 and 63

15 = 3  * 5

63 = 3 * 3 * 7

HCF ( 15 , 63) = 3

Step 2:

Find HCF of 22 and 91

22 = 2  * 11

92 = 13 * 7

HCF (22 , 91) = 1

Step 3:

Find HCF of 23 and 95

23 = 23  * 1

95 = 19 * 5

HCF (23 , 95) = 1

Step 4:

Find HCF of 31 and 97

HCF (31 , 97) = 1

All the pairs are coprime except 15:63

hence 15:63 is the odd one out.