What is the least common multiple of 40 60 and 80?

Answer 1

To find the least common multiple (LCM) of 40, 60, and 80, we first need to break down each number into its prime factors. The prime factorization of 40 is 2^3 * 5, 60 is 2^2 * 3 * 5, and 80 is 2^4 * 5. To find the LCM, we take the highest power of each prime factor that appears in any of the numbers: 2^4 * 3 * 5 = 240. Therefore, the least common multiple of 40, 60, and 80 is 240.

Answer 2

Factor trees are found to find the LCM. 60 = 30 x 2 = 10 x 3 x 2 = 5 x 2 x 3 x 2 (prime numbers, no further breakdown) 80 = 40 x 2 = 20 x 2 x 2 = 5 x 4 x 2 x 2 = 5 x 2 x 2 x 2 x 2 (prime numbers, no further breakdown) Notice that 5 x 2 x 2 appers in the factor tree for 60 and 80. Times all the factor tree numbers together and cross out 5 x 2 x 2: 3 x 5 x 2 x 2 x 2 x 2 = 240 which is the of 60 and 80 QED.

Answer 3

Multiples of 100- 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000

Multiples of 80- 80, 160, 240, 320, 400, 480, 560, 640, 720, 800

Lowest common multiple is 400

Answer 4

The Least Common Multiple (LCM) for 40 60 is 120.

Answer 5

The LCM is: 240

Answer 6

The LCM is 80.

Answer 7

It is: 1 but the HCF is 20

Answer 8

60.

Answer 9

1200