Question

Find all the numbers less than $100$, which are common multiples of $3$ and $5$.

Answer 1

Step 1: Determining the multiples of the given numbers

Multiples of $$\begin{gathered} 3:3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60, \\ 63,66,69,72,75,78,81,84,87,90,93,96,99 \end{gathered}$$

Multiples of $5:5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95$

Step 2: Finding the common multiples

Common multiples of $3$ and $5$, less than $100:$ $15,30,45,60,75,90$

Therefore, the common multiples have been determined.