How to do this Math question?

Test Preparation
1

<p>Remove the space between “im” and “gur” in order to see the image</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/EUdNK17.png
Answer: C</p>

2

<p>Each of the 40 customers bought 2 robots, leaving 70 robots left to sell. Therefore 35 customers could buy an additional 2 robots, leaving 5 customers with only 2 robots.</p>

3

<p>Another way to do this. 40 x 4(the amount of robots maximum) equals 160. 160- 150 = 10. 10/2(the amount of robot each person can buy the second time)= 5. 5 people cannot buy 4 robots.</p>