Question

Using the common multiple method, the LCM of 10, 15 and 25:

Options

• 50

• 75

• 150

• 300

Answer 1

150

Explanation: 

Multiples: M₁₀ = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, …

M₁₅ = 15, 30, 45, 60, 75, 90, 105, 120, 135, 150,…

M25 = 25, 50, 75, 100, 125, 150, … 

The smallest common multiple is 150.