Steve has 25 socks. He has 4 pairs of socks that match, and all the others don't match. How many mismatching socks does Steve have altogether?
In each pair of socks there are 2/1 = <<2/1=2>>2 socks.
Steve has 2*4 = <<2*4=8>>8 matching socks.
Steve has 25-8 = <<25-8=17>>17 mismatching socks.
#### 17