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?

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.

25 (a week mowing lawns) multiplied by 20 (weeks)
25 x 20 = 500 (profit total without subtracting lawn mower)
500 - 250 (lawn mower) = 250 profit for 20 weeks.
If Scott spends another 20 weeks, he would gain 500 profit total, because the price of the lawn mower is one time.