Method to find LCM of two numbers a & b:
1- Find GCF of a & b.
2- Find product of a & b.
3- Divide the result obtained in step 2 by the GCF. The result is LCM of a & b.
1- GCF of 36 & 80 = ?
Prime factorization of 36 = 2x2x3x3
Prime factorization of 80 = 2x2x2x2x2x5
GCF = 4
2- Product of 36 & 80 = 2880
3- LCM = 2880/4 = 720
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The Least Common Multiple (LCM) of 36 and 80 is 720.
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The Least Common Multiple (LCM) for 4 5 16 is 80.
The Least Common Multiple (LCM) for 16 20 is 80.