Question

Find the HCF of the following numbers by prime factorisation:- 1) 140,160,240.​

Answer 1

full form of HCF is highest common factor so the no. which comes in the most is the answer

Answer 2

Solution :

(for factorisation, refer to attachment)

so, 140 = 1×2×2×5×7

160 = 1×2×2×2×2×2×5

240 = 1×2×2×2×2×5×3

So common factor of 140, 160 & 240 = 1,2,2 & 5

So , highest common factor = 2×2×5 = 20

hcf = 20