CombinationLock.com (Combination Lock) provides math games in which you use the clues
to work out the combination of a lock in order to open it. The answers and the clues to the number games are
computer generated and completely random (except the home page math puzzle which is fixed).
The Practice area is for practising the different puzzle
types. Solo Play games unlock as you complete each one.
Your best times for these number games are displayed in the Hi Scores area.