Question

The LCM of smallest two digits composite number and the smallest composite number is​___________?

Answer 1

As we know, the smallest two-digit composite number is $10$ and the smallest composite number is $4$.

By prime factorisation, we get;

$$\begin{gathered} 4=1\times 2\times 2 \\ 10=1\times 2\times 5 \end{gathered}$$

Now, LCM of$4,10=2\times 2\times 5=20$

Therefore, the LCM of the smallest two-digit composite number and the smallest composite number is $20$