Question

72,90 highest common factor

Answer 1

Answer:

18

Step-by-step explanation:

To find the HCF we divide the greater number (a) by the smaller number (b) and then

• in case remainder (r) is left we divide the smaller number (b) by the remainder (r).
• in case of the absence of a remainder(i.e r = 0) we already have the HCF.

repeat this process until no remainder is left.

90 divided by 72

quotient = 1

remainder = 18

72 divided by 18

quotient = 4

remainder = 0

thus HCF of 72,90 = 18