Question

LCM of 15 and 21 is 105. Find HCF of 15 and 21

Answer 1

LCM × HCF =a×b

105×HCF =15×21

HCF = 15×21/105

HCF = 3

Answer 2

Answer:

HCF =3

Step-by-step explanation:

LCM × HCF = a×b

105 ×HCF  =  15 × 21

HCF  = 15 × 21 / 105

HCF  = 3  

here,

LCM of 15 and 21 is 105

HCF of 15 and 21 is 3

hope it helps u