Question

Find the HCF of each group of numbers.
(a) 28, 63 and 91 (b) 60, 75 and 300​

Answer 1

Answer:

a) 7

b)15

Step-by-step explanation:

a)The factors of 28 are: 1, 2, 4, 7, 14, 28

The factors of 63 are: 1, 3, 7, 9, 21, 63

The factors of 91 are: 1, 7, 13, 91

Then the greatest common factor is 7.

b)The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

The factors of 75 are: 1, 3, 5, 15, 25, 75

The factors of 300 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 150, 300

Then the greatest common factor is 15.