Find the LCM of the following numbers:
(a) 9 and 4
(b) 12 and 5
(c) 6 and 5
(d) 15 and 4
To do :
We have to find the LCM of the given pairs of numbers.
Solution :
(a) LCM of 9 and 4 is,
$9=3\times 3$
$4=2\times 2$
LCM of 9 and 4 $= 2\times 2\times 3\times 3$
$= 36$
Therefore, the LCM of 9 and 4 is 36.
(b) LCM of 12 and 5 is,
$12=2\times 2\times3$
$5=1\times 5$
LCM of 12 and 5 $= 2\times 2\times 3\times 5$
$= 60$
Therefore, the LCM of 12 and 5 is 60.
(c) LCM of 6 and 5 is,
$6=2\times3$
$5=1\times 5$
LCM of 6 and 5 $= 2\times3\times 5$
$= 30$
Therefore, the LCM of 6 and 5 is 30.
(d) LCM of 15 and 4 is,
$15=3\times5$
$4=2\times 2$
LCM of 15 and 4 $= 3\times5\times 2\times2$
$= 60$
Therefore, the LCM of 15 and 4 is 60.
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