Question: John goes to the store to buy Slurpees and gives them $20. Slurpees cost $2 each and he got $8 in change. How many Slurpees did he buy? Think carefully first, then make a decision:
He spent 20 - 8 = $12 on Slurpees. So he got 12 / 2 = 6 Slurpees. So the answer is 6.