Question

Find the HCF and LCM of 21,49,84

Answer 1

Answer:

HCF - 7

LCM - 588

Explanation:

21 - 7*3

49 - 7*7

84 - 7*4*3

Answer 2

Answer:

Explanation:

first find the factors of 21 , 49 and 84 like this below

factors of 21 = 1,3,7,21

factors of 49 = 1,7,49

factors of 84 = 1,2,3,7,84

then find the commen factors in all these three factors

like 7 and 1 are coming in the three of these so know you will multiply these both like this

commen factor = 1 multiply( place sign of multiply ) by 7 = 7

h.c.f. = 7