If buy 5 sandwiches you get 3 more for free. If you buy 659 sandwiches how many sandwiches do you pay

Question

If buy 5 sandwiches you get 3 more for free. If you buy 659 sandwiches how many sandwiches do you pay for

 

Answer 1

5 paid + 3 free = 8 sandwiches

How many multiples of 8 are there in 659?

To get the answer you divide 659/8 = 82 remainder 3

So you pay for 5 x 82 = 410

You get 3 x 82 = 246 for free

410 + 246 = 656

Then you have to pay for 3 more sandwiches.

So you pay for 410 + 3 = 413 in all