What is the LCM of 15 25 and 30?

Answer 1

Answer 1: Listing multiplesList the first multiples of each number, 15, 25 and 30.

15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150

25: 25, 50, 75, 100, 125, 150, 175, 200, 225

30: 30, 60, 90, 120, 150, 180, 210, 240, 270

150 is the lowest common multiple of 15, 25 and 30.

Answer 2: Using prime factors

This is done by taking the number with the most same prime numbers and multiply it.

List the prime factorization of each number.

15: 3 x 5

25: 5 x 5

30, 2 x 3 x 5

30 is the only number with a two so one two is taken.

15 and 30 each have a three so only one three is taken.

25 has two 5's so two fives are taken.

2 * 3 * 5 * 5 = 150

150 is the lowest common multiple of 15, 25, and 30.

Answer 2

LCM: 150