Question

What is the least common multiple of 70, 60, and 50?

Answer 1

Least common multiple of 70, 60, and 50

70=2×5×7
60=2×2×3×5
50=2×5×5

L.C.M. of  70,60,and 50=2×2×3×5×5×7=2100

Answer 2

70|2
35|5
7|7

60|2
30|2
15|3
5|5
1

50|2
25|5
5|5
1

$LCM(50,60,70)=2^2\cdot3\cdot5^2\cdot7=2100$