Question

find hcf and lcm of 12,15,21

Answer 1

Hii friend,

Prime factorisation of 12 = 3× 2 × 2

Prime factorisation of 15 = 3 × 5

prime factorisation of 21 = 3×7

HCF OF 12 , 15 AND 21 = 3


HOPE IT WILL HELP YOU..... :-)

Answer 2

The answer is given below :

The numbers are

12 = 2 × 2 × 3

15 = 3 × 5

21 = 3 × 7

So, hcf (12, 15, 21) = 3

and

lcm (12, 15, 21) = 2 × 2 × 3 × 5 × 7 km

= 420

Thank you for your question.