Question

What's the common difference of the sequence -5, -2, 1,4,7, ...?

Answer 1

To find the common diference we substract each of the number by the previous one:

$\begin{gathered} -2-(-5)=3 \\ 1-(-2)=3 \\ 4-1=3 \\ 7-4=3 \end{gathered}$

Therefore the common difference is 3 and the answer is B.