Show that $45$ and $56$ are co-prime numbers.

Find the pairs of co-prime numbers.

$15,16,21, \text{and} 28$

Find the greatest number that can divide $93,111$ and $129$, with remainder $3$ in each case.

(Since,$93-3=90, 111-3=108$ and $129-3=126$)

Using common multiple method, find the L.C.M of the following:

$8, 12$ and $24$ 

Using common multiple method, find the L.C.M of the following:

$10, 15$ and $20$ 

Using common multiple method, find the L.C.M of the following:

$3, 6, 9$ and $12$ 

Find the L.C.M of following numbers, using (i) Prime factor method and (ii) Common division method.

Find the L.C.M of following numbers, using (i) Prime factor method and (ii) Common division method.

Find the L.C.M of each of the following groups of numbers, using (i) prime factorization method and (ii) the common division method.

$14, 21$ and $98$