Question

Every 8th customer gets a $50 gift certificate.

$50

$10.

Every 6th customer gets a \$10 gift certificate.

To celebrate its grand opening, a store is giving customers gift certificates. Which customer is the first to get two gift certificates?

Answer 1

The answer is the 24th customer
You need to find the LCM of 6 and 8.
If you prime factorize both you get…
6=(2)(3)
8=2^3
So 2^3, which is 8 times 3 is 24.
The answer is the 24th customer.