Zoom Warning
The online Proof! game plays exactly like the
classic Proof! card game.
Work your mental math magic by creating equations using at least three cards and as many math symbols as needed. For example, if you had the cards 2, 4, 7, and 1 you could make 2 + 4 = 7 - 1.
To enter your equation,
click or tap a card, then a math symbol, and then another card
to combine those cards using that operation. Once you create
two or more numbers
with matching values,
click or tap the Proof! button
to submit it.
The
number of cards you used
in the equation will get
added to your score
and they'll be replaced with new cards for endless math fun.
If you
sign up
and
log in
while playing,
your score will automatically be submitted to the
daily leaderboard
where your math wizardry will be forever immortalized.
This is your score so far for today. You earn 1 point per card used in a valid equation.
If you
sign up
and
log in
while playing,
your score will be automatically submitted to the
daily leaderboard
where your math wizardry will be forever immortalized.
Compete with your friends to see who is the greatest math wizard of all time! If you play while signed in, each day your score will be automatically uploaded to the daily leaderboard. (Note that the leaderboard runs on Eastern Time with a cutoff at midnight EST.) Will you earn today's trophy?
Zoom Warning
It looks like you are using Safari and have your browser window zoomed in or out. The Proof! online game will still work, but it's functionality will be diminished. For optimal peformance, please unzoom your browser window (Cmd+0 on Mac or Ctrl+0 on PC) or use a different browser such as Chrome or Firefox.
Great job with those equations so far! We just wanted to let you know that you're not currently logged in to an account, so your score won't show up on the leaderboard yet. If you want to compete with others, sign up or sign in first. But don't worry, if you log in now your points will be transferred over so you can hit the ground running.
That's a legit score! Just a reminder that you're not currently logged in to an account, so your score won't show up on the leaderboard yet. If you want to compete with others, sign up or sign in first. But don't worry, if you log in now your points will be transferred over so you can hit the ground running.
Wow, looks like you're really wracking up those points! This might be a great time to sign up or sign in so you don't lose your progress. If you log in now your points will be transferred over and you'll be able to see how you're doing on today's leaderboard. But feel free to stay logged out if you prefer to just play on your own.
