Level 3
The cost of 6 files and 10 markers is $40. What is the cost of 9 files and 15 markers?
3 m
Level 2
For every 500 cupcakes that Adam's factory produces,
it produces 300 muffins and 200 buns.
It produces 1000 cupcakes.
  1. How many buns does Adam's factory bake?
  2. How many less muffins than cupcakes does Adam's factory produce?
  3. How many muffins, cupcakes and buns does Adam's factory produce in total?
3 m
Level 2
For every 500 cupcakes that Adam's factory produces,
it produces 300 muffins and 200 buns.
It produces a total of 1600 cupcakes and muffins,
  1. How many buns does Adam's factory bake?
  2. How many more cupcakes than buns does Adam's factory produce?
  3. How many muffins and buns does Adam's factory produce in total?
3 m
Level 3
Adam buys 2 identical stickers and 2 marbles for $8.
How much will Adam pay if he buys 1 such sticker and marble?
2 m
Level 2
A pitcher can hold 5ℓ of water.
A pail can hold 15ℓ of water.
How many pitchers are needed to fill the pail?
2 m