Chapter 8, Problem 2QC

To determine

To find: the next term in the given sequence

Answer to Problem 2QC

The next number should be 80.

Explanation of Solution

Given:

  $5,10,20,40,\dots .$

Calculation:

Observing the sequence, from one number to the next, the next number is multiplied by 2.

  $\begin{array}{l}5\times 2=10\\ 10\times 2=20\\ 20\times 2=40\end{array}$

Therefore, for the next number, multiply 40 by 20 to have 80.

Conclusion:

Therefore, the next number should be 80.