Arithmatic Mania
How good are you at basic arithmatic? Deal with whole numbers and show you qualify the bare minimum!
3 minutes
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80 in 8
Race against the clock— solve 80 arithmatic puzzles in just 8 minutes to sharpen your math skills and speed!
8 minutes
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Find Next in Sequence
Unlock the pattern! Test your logic with 'Find Next in Sequence'—can you spot the missing piece?
5 minutes
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Pump Up The Balloon
Pump the balloon to earn points, but beware—push your luck too far, and it might just pop!
30 rounds
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Card Counting
Trade against a market quote on hidden card sums. Price the deck, size your edge, and manage variance.
20 rounds
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Dice Market Maker
Quote a two-way market on partially hidden dice and manage spread, adverse selection, and inventory — or flip to Take mode and trade someone else's quote.
10 rounds
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Fermi Estimation
Put a confidence interval around unknown quantities. Scored as a probability distribution — wide ranges are safe and worthless, narrow wrong ones are expensive.
10 rounds
