LCM( 10, 24 ) = 120
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 10, b = 24 and GCD(10, 24) = 2.
$$ \text{LCM} (10, 24) = \frac{ 10 \cdot 24 }{ \text{GCD}(10,24)} = \frac{ 240 }{ 2 } = 120 $$