Twenty problems in five rounds, easy to hard, 15 seconds each, and one life. Do it in your head and pick from four; every problem you clear is a point. Keys 1 to 4 answer. The clock starts when you do.
Blitz is a free daily mental math game from Mind Loft. Twenty arithmetic problems climb through five rounds, from two-digit addition and the times tables up to two-digit multiplication, awkward percentages, order of operations and cubes. You get fifteen seconds each and one life, so your score is simply how far up the ladder you got before a wrong answer or an empty clock stopped you.
The four options are not padding. Every wrong answer on the board is a mistake somebody actually makes: a dropped carry, a slipped times-table row, the left-to-right reading of a line that needs precedence, the cube next door. You cannot pick the right one out by its last digit or by its size, which means there is no way through but the arithmetic.
Everyone plays the same twenty problems in the same order each day, so the daily leaderboard is a straight fight: furthest wins, and ties break by time. Twenty new problems drop every day at midnight Eastern. No app, no signup, play free in your browser, keep a streak, and race the daily leaderboard. If you would rather be asked what you know than what you can work out, try Streak or Deep. More numbers: Crunch and Cipher.