what is the least common multiple of 4 and 10?

Explanation:

Step1: Prime - factorize the numbers

$4 = 2\times2$; $10=2\times5$

Step2: Determine the LCM

The LCM takes the highest - power of each prime factor. For prime factor 2, the highest power is 2 (from 4), and for prime factor 5, the highest power is 1 (from 10). So, $LCM(4,10)=2\times2\times5$ $LCM(4,10) = 20$

Answer:

20