Find the greatest common divisor of 65, 75 and 90.

Correct option is A

Given:

Number given are 65,75,90

Formula Used:

The greatest number that divides the number is called HCF or Greatest common divisor

Prime factorisation

Solution:

Prime factorisation of number are:

65 = $$5 \times 13$$​​

75 = $$3 \times 5^2$$​​

90 =$$2 \times 3^2 \times 5$$​​

For HCF we includes only the common factors

HCF = 5