Deductidle

Daily Triplets MATH

A secret math rule is hidden each day and you have to deduce it just by testing three digit numbers that either get accepted or rejected by the rule. Form a hypothesis in your mind, then see if you're right!

D3C1PH3R LOGIC

D3C1PH3R is a daily code-breaking challenge. Each day of the week brings a new hidden number sequence — starting with 3 digits on Monday and scaling up to 6 by Sunday. Use logic, process of elimination, and nerve to crack the code before your guesses run out.

Threezy LOGIC

Threezy is a card puzzle inspired by the game SET. Spot a "set" of three cards where shape, color, fill, and count are each all-same or all-different, as fast as you can!

Riddle of the Day LOGIC

One reasoning riddle every day, with progressive hints, open-answer checking, a clear explained solution, and a calendar/archive of previous puzzles.

The Club TRIVIA

Some are in the club, some are not. Work out the secret rule and judge five more at the door. A new club every day.