What's new

November 2, 2026

HumanCalc 1.0

• Number Memory. A new digit span test. Open to everyone, no sign-in needed.
• Make 24. The classic 24 puzzle: four numbers, + − × ÷, make 24. Twenty puzzles, the last three need a fraction. Open to everyone. Play it.
• Smoother difficulty in Flash Anzan, Mental Arithmetic, Serial Addition, Math Chain and Blink and Add. Difficulty steps are based on how players actually progressed.
• More levels in Mental Arithmetic and Missing Operator.
• Odd One Out goes to 27 levels. The grid keeps growing up to 17×17, and the last four levels use symbols instead of letters. Play it.
• Challenge a friend. Send your score to someone with a link.
• Live feed of what other players are training.
• Dark theme. Switch between light and dark with the sun and moon button in the header.
• Tidier mobile header. It fits narrow phone screens, including when you are signed in.