Answer:
(a) LCM of 9 and 4 2 9, 4 2 9, 2 2 9, 1 3 3, 1 1, 1
\[\therefore \] LCM\[=2\times 2\times 3\times 3=36\] (b) LCM of 12 and 5 2 12, 5 2 6, 5 2 3, 5 5 1, 5 1, 1
\[\therefore \] LCM\[=2\times 2\times 3\times 5=60\] (c) LCM of 6 and 5 2 6, 5 3 3, 5 5 1, 5 1, 1
\[\therefore \] LCM\[=2\times 3\times 5=30\] (d) LCM of 15 and 4 2 15, 4 2 15, 2 3 15, 1 5 5, 1 1, 1
\[\therefore \] LCM \[=2\times 2\times 3\times 5=60\] Here, we see that in each case LCM of given numbers is a multiple of 3 and 2. Yes, in each case LCM = Product of two given numbers.
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