Chapter 1.3, Problem 63PFA

To determine

Choose the correct answer.

Answer to Problem 63PFA

The correct answer is “Option A”.

Explanation of Solution

Given information:

When a number is tripled, its value increases by 10. What is the original number?

  $\begin{array}{l}○\text{A}\text{ 5}\\ ○\text{B}10\\ ○\text{C}15\\ ○\text{D}30\end{array}$

  $\begin{array}{l}\text{Number after tripling Number increased by:}\\ \\ 5\times 3=15\text{ 15-5=10}\\ \\ 10\times 3=30\text{ 30-10=20}\\ \\ 15\times 3=45\text{ 45-15=30}\\ \\ 30\times 3=90\text{ 90-30=60}\end{array}$

So, as we can see in above calculation only number 5oroption A is increasing by 10.