Question

If $s$ is a multiple of $12$ and $t$ is a multiple of $12$, is $7s+5t$ a multiple of $12$?

• A. True
• B. False

Answer 1

The correct option is A True

Yes
If $s$ is a multiple of $12$, then so is $7s$. If t is a multiple of $12$, then so is $5t$. Since $7s$ and $5t$ are both multiples of $12$, then their sum $(7s+5t)$ is also a multiple of $12$.