Do you know other nice brain teasers, riddles or puzzles that should be on the site?
If that's the case, send a message to pzzls!
math puzzle
24 = ?
Make 24 by using the following numbers only once: 1, 3, 4 and 6. You are allowed to add, subtract, multiply, divide and to use curly brackets. Do the same excercise with 3, 3, 7 and 7.