Astore is giving away a $10 coupon to every 7th person to enter the store and a $25 couplon to every 18th person to enter the store. which person will be the first to get both coupons?

show the solution

Every 7th person get 10 dollar coupon
Every 18th person gets a 25 dollar coupon
That means the first number that is a multiple of both 7 and 18 is the number of the person who will get the coupon.
You are looking for the lcm of 7 and 18.
Because they have no common factors multiply them so the 126th person is the first one to get both coupons.

I’m not sure how this works

3cm and 6 and 9 cm that a possibility of that question