Four Twos
What values can you make?
Use all four twos, and the operations available from the buttons below, to construct various mathematical expressions. Click a button to add an operator tile, and then build up expressions by dragging the tiles on top of each other in the shaded area — the borders will turn red when combination is possible. (You can also drag two numbers together to join them.)
  • Can you construct expressions that evaluate to each number from 1 to 10?
  • (Don't try too hard to get 7 — it's impossible!)
  • What other interesting values can you make?
  • How big do you think the largest possible value might be? See if you can make it.
Click Save to store a copy of any complete expression in the box on the right.