Mental math games

Short answer: R3CK0N has free mental math games you can play in the browser with no account: an Arcade of quick number games, each with its own best score, a daily challenge that is the same for everyone, and head-to-head duels on a ranked ladder. Drills build speed, but games keep you coming back.

Every Arcade game

• Survival: Three hearts and no clock. Answer arithmetic problems that get harder every ten right answers, and see how many you can survive.
• Rainfall: Arithmetic problems fall like rain. Type an answer to pop its drop before it hits the ground. Three splashes and the round is over.
• Higher or Lower: Two expressions, one choice: tap the bigger one before time runs out. A fast number-sense game that needs no typing.
• Chain: Every answer starts the next problem. Keep a running number in your head as the operations keep coming, for as long a chain as you can.
• Target: Combine four numbers with + − × ÷ to hit the target. Play timed, or solve the daily puzzle that everyone gets.
• Bullseye: A few seconds per problem is too short to calculate, so estimate. The closer your guess, the more it scores.
• Boss raid: Every right answer is an attack from your pet. Wear this week's boss down a round at a time and earn Shells when it falls.
• Flash Sum: Numbers flash on screen one at a time; add them up in your head. A free flash anzan style trainer that gets faster every round.
• Prime Time: A number appears: prime or not? Tap fast before it's gone. Watch for the sneaky composites like 91 and 221. Free and no account needed.
• Missing Number: Equations with one blank: type the number that makes them true. From ☐ + 37 = 92 up to two-step equations. A free mental math game.
• Bits: Flip the bits to match a number, or read the bits and type the number. Binary and hex conversion practice for programmers and interviews.
• Make Ten: Select touching digits that add up to ten and watch them clear. A relaxing free number puzzle against a two-minute clock.
• Big Target: Combine six numbers with + − × ÷ to reach a three-digit target. The classic numbers-round puzzle, free and in your browser.
• Cages: Fill the grid so every row and column has each number once, and every cage makes its target. Timed 4×4 grids and a daily 5×5.
• Sort It: Tap the cards from smallest to largest: whole numbers, decimals, fractions and expressions. A free number sense game.
• Factor Rush: A number appears with a grid of candidates: tap all of its factors before time runs out. Free factors and divisibility practice.
• Number Line: Tap the number line where a fraction, decimal, percentage or negative number goes. The closer you land, the higher you score.
• Time Check: Read an analog clock, add hours and minutes, and work out the time between two times. Free telling-time practice.
• Change Maker: Work out the change from a purchase, then make an amount with the fewest coins. Free money math practice.
• Percent Shop: Sale prices, tips, tax and percentage changes, all mental math with clean answers. Free percentage practice for shopping and the GRE.
• Math Bingo: Problems are called one at a time; if the answer is on your card, mark it. Rows, columns and diagonals score bonuses. Free math bingo online.

The full list is in the Arcade.

Daily challenge

The same twenty problems for everyone, once a day, one attempt, so you can compare your time. Play today's challenge.

Duels

The Arena pairs you against another player on the same set of problems, casual or ranked, with a ladder from Iron to Champion.

Games or drills?

Games are best for keeping the habit going. For raw speed on one operation, short timed drills work faster, because every rep targets the same skill. A mix of both, a few minutes a day, is what most players stick with. The mental math practice guide has a routine.