Walk from START to END one touching button at a time. The route you walk is a sum, it reads left to right like a calculator, and it has to come out at 828.
Calc is a free daily number puzzle from Mind Loft. The board is a grid of calculator buttons that alternate number, operator, number. You walk from the top-left button to the bottom-right one, a touching button at a time, and the route you walk is a sum: it reads left to right the way a calculator does, so 7 + 8 × 2 comes out at 30 rather than 23. Land on the last button holding exactly the target and the day is yours.
Three rules do the work. No button can be used twice inside one route. A division that would not come out whole is not a legal step, so nothing is ever a fraction. And the route has to finish on the bottom-right button, which is what makes the last operator before it the one worth thinking about. Arriving on the wrong total costs a try and nothing else, so you can back up and take another line as often as you like.
Boards run six across early in the week and seven from Thursday, and every one is checked before it ships, so a route to the target always exists. Sundays are a harder Edition with three targets on the one board. A new board drops every day at midnight Eastern. No app, no signup — play free in your browser, keep a streak, and race the leaderboard. More number puzzles: Crunch, six numbers into one target, and Cipher, where every letter is a digit.