R K Bansal Solutions for Chapter: H.C.F. and L.C.M., Exercise 2: Revision Exercise (Chapter 8)

Find the H.C.F. of:

$108, 288$ and $420$

Find the H.C.F. of:

$36, 54$ and $138$

Find the L.C.M. of:

$72, 80$ and $252$

Find the L.C.M. of:

$48, 66$ and $120$

State true or false (Give an example in support of your answer in each case):

H.C.F. of two prime numbers is $1$.

State true or false (Give an example in support of your answer in each case):

H.C.F. of two co-prime numbers is $1$.

L.C.M. of two prime numbers is equal to their product.

L.C.M. of two co-prime numbers is equal to their product.