The Proof! Math Puzzle Challenges play exactly like the
classic Proof! card game,
except here you're looking for a specific type of equation,
rather than just any equation at all.

First,
**read the title**
of the challenge to understand what you're looking for. You can click the
for a more detailed explanation.

Then, start solving it by
**clicking a card, then a math symbol, and then another card**
to combine those cards using that operation. Once you create
**two or more cards with matching values**
(called a pair, triplet, etc.)
that fit the bill for this challenge, you'll win!

Full instructions
for the classic game can be found here.

If you're stuck, first try clicking the
near the title of the challenge for a more detailed explanation
and an example of what you're looking for.

If you're still stuck, click "Show Hint" below to reveal the hint for this challenge.
If you're still having trouble after that,
drop us a line
and we'll help you out. Be sure to tell us which challenge you're working on!

Show Hint
This is one of our most difficult challenges! To solve it, you'll have to use all 9 cards, and you'll have to look for three different, creative ways to make -½. For one of the ways, your last step will be to do 0 - ½. For another way, your last step will be ½ - 1. For the last way, you'll need to do something else similar. See if you can take it from here!

From the makers of Proof! comes the brand new math game, Adsumudi! Find the secret math path to Adsumudi's answer on each card by adding, subtracting, multiplying, and dividing the other numbers. Find it first and collect the card. Five cards wins!

Learn More