Yorimichi GamesMath games
Mental math, number puzzles, shapes and more: practice math while you play.
Math games (11)
Calculation SolitaireBuild four foundations from A, 2, 3 and 4 by ones, twos, threes and fours, parking cards on four waste piles
Cryptarithms (Missing Digits & Alphametics)Fill the missing digits of worked sums or crack letter sums – every puzzle has one answer
Shut the BoxRoll two dice and flip down numbered tiles that add up to the total. Shut every tile to shut the box
Soroban (Japanese Abacus)Flick the beads of an online soroban and practice adding and subtracting
Cross SumsFill the white cells with 1–9 so every across and down run adds up to its clue
Dice RollerRoll 1 to 10 virtual dice from D4 to D20, with totals, roll history and a big-screen mode
Magic SquareFill the grid so every row, column and diagonal adds up to the same number
Make 10Find numbers that add up to 10 and clear them. Practice number bonds to 10, then clear the whole puzzle board
Make 10Use four numbers once each with +, −, ×, ÷ and brackets to make exactly 10
Matchstick PuzzleMove one or two matchsticks to fix the equation, or rearrange them to make squares
Prime Factorization GameFactor trees and the ladder method, a 60-second prime or not race and the Sieve of Eratosthenes, with printables