What is the least common multiple of 9 15 and 21?

Answer 1

Prime factorization of 9 = 3x3

Prime factorization of 21 = 3x7

Prime factorization of 35 = 5x7

3 is common in P.F. of both 9 and 21. 7 is common in P.F. of both 21 and 35.

L.C.M. = Multiplication of common numbers x Multiplication of uncommon numbers L.C.M. = 3x7(common numbers) x 3x5(uncommon numbers) = 21x15 = 315

Answer 2

LCM of 9 15 and 21 is 315.

Prime Factorization:

9 = 3 x 3

15 = 3 x .......5

21 = 3 x ............7

35 =.............5 x 7

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LCM=3 x 3 x 5 x 7 = 315

Answer 3

The LCM of 12, 15, and 21 is: 420

Answer 4

The Least Common Multiple (LCM) for 9 10 12 21 is 1,260.

Answer 5

Least common multiple of 12 15 and 21 is 420.

Answer 6

The LCM of 9, 12, 16 and 21 is 1008.

Answer 7

315