Question

A store is holding a grand opening promotion. Every 3rd customer receives a free key chain and every 4th customer receives a free magnet. Which customer will be in the first to receive both a key chain and a magnet?

Answer 1

12th Customer

Explanation:

We have to find the lcm (lowest common multiple) of the number.

We do that by taking their multiples. Watch down below

3 x 1 = 3 4 x 1 = 4

3 x 2 = 6 4 x 2 = 8

3 x 3 = 9 4 x 3 = 12

3 x 4 = 12

See how they both have a 12 as their first lcm.

So the 12th customer gets both items.

Glad to help!