Question

8.

John buys some boxes of pencils and some packets of pens for people to use at a
conference
There are 40 pencils in a box.
There are 15 pens in a packet.
John gives one pencil and one pen to each person at the conference,
He has no pencils left.
He has no pens left.
How many boxes of pencils and how many packets of pens did John buy?

Answer 1

Answer: He bought 3 boxes of pencils and 8 boxes of pens.

Explanation:

Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120

Mulitples of 40: 40, 80, 120

This means that there are 120 people at the conference, and that he bought 3 boxes of pencils (40x3=120) and 8 boxes of pens (15x8=120)