If you can buy 5 apples for $3, then how many apples can
you buy for
a) $12
b) $18
c) $9
d) How much would 25 apples cost? 

Alvin has many apples. He gives 1/3 of his apples plus 2/3 of an apple to Bob. 

He then gives 1/4 of his remaining apples plus half an apple to Chris. 

Afterward, he gives half of his remaining apples to David. 

Lastly, he gives half of his remaining apples plus half an apple to Ed. 

In the end, Alvin has 5 apples left. How many apples does Alvin have initially?

I bought 99999 apples my friends took a third how many apples I got

Charlene has 18 more apples than Raul. Raul has 36 apples. Write an equation to represent this situation and determine how many apples Charlene has.