Question

Find l.c.m by division method a) 125,160,280

Answer 1

Answer:

LCM = 28,000

Step-by-step explanation:

Division Table

2 ║125, 160, 280

2 ║125, 80, 140

2 ║125, 40, 70

2 ║125, 20 ,35

2 ║125, 10, 35

5 ║125, 5, 35

5 ║25 1, 7

5 ║5 1, 7

7 ║1 1, 7

1 ║1 1

Bring down any numbers that are not evenly divisible by the prime number.

When the last row of results is all 1's you are done.

Find the product of the prime numbers in the first column to get the LCM:

LCM = 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 7

LCM = 28,000

Therefore,

LCM(125, 160, 280) = 28,000