Question

Find the LCM of 160, 170 and 90.

Answer 1

We have,

2	160, 170, 90
2	80, 85, 45
2	40, 85, 45
2	20, 85, 45
2	10, 85, 45
3	5, 85, 45
3	5, 85, 15
5	5, 85, 5
17	1, 17, 1
	1, 1, 1

∴ The LCM of 160, 170 and 190 

= 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 17

= 24480