Answer :

**(a)**

We have,

=

LCM of 3 and 7 is 21.

=

=

(b)

We have,

LCM of 10 and 15 is 30,

=

=

=

(c)

We have,

LCM of 9 and 7 is 63,

=

=

=

(d)

We have,

LCM of 7 and 3 is 21,

=

=

=

(e)

We have,

LCM of 5 and 6 is 30,

=

=

=

(f)

We have,

LCM of 5 and 3 is 15,

=

=

=

(g)

We have,

LCM of 4 and 3 is 12,

=

=

=

(h)

We have,

LCM of 6 and 3 is 12,

=

=

=

=

(i)

We have,

LCM of 3,4,2 is 12,

=

=

=

(j)

We have,

=

LCM of 2,3,6 is 12,

=

=

= 1

(k)

We have,

1 + 3

=

=

=

= 5

(l)

We have,

4 + 3

= +

=

=

=

(m)

We have,

=

=

(n)

We have,

LCM of 3 and 2 is 6,

=

=

=

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