Can you solve these fraction word problems?

From the children in Room 18

There are 30 dog biscuits.  There are two dogs.  One dog eats half and the other dog eats one third. How many dog biscuits are eaten?  How many are left?

There are 54 toys in the toy shop.  Bianca buys two sixths of the toys.  Lea buys one sixth of the toys that are left.  How many toys are there now?

Sixty pens are four twelfths of the number.  What is the whole number?

There are 24 golden apples and Notch eats two sixths and Herobrine eats two quarters. How many are eaten?  How many are left?

There are 24 pineapples.  Shriya eats five sixths of the pineapples. How many are left?