Question: John buys 10 packs of magic cards.  Each pack has 20 cards and 1/4 of those cards are uncommon.  How many uncommon cards did he get? Is final answer 50?
Answer: Each pack has 20/4 = <<20/4=5>>5 uncommons
So he got 10*5 = <<10*5=50>>50 uncommons
#### 50