Question

2. Find the HCF of the following numbers
by prime factorisation.
a) 21, 45
b) 153, 27
c) 38, 361
d) 36, 72, 84
e) 75, 25, 120 f) 112, 140, 168​

Answer 1

Step-by-step explanation:

(f) 112 = 2 * 2*2*2*7

140= 2*2*5*7

168= 2*2*2*3*7

HCF(112,140,168) = 2*2*7