BODMAS

Explorer I

600 · 50 to Explorer II

Work out the expression in the right order: brackets, then powers, then × and ÷, then + and -.

How your rating works

Each game has its own rating. As it climbs the questions get harder, and if it drops they get easier, so they always suit you.
Right answers raise your rating and wrong ones lower it. There is no rush: only a very slow answer counts a little less.
Playing more rounds does not raise it by itself. Only playing better does, and a weaker round can lower it.
Everyone starts at the bottom, Explorer I. Your rating moves after every answer, so the next question already fits you. It moves fast in your first rounds of a game and settles as you play more.
It updates the moment a round ends. As a guest it is saved on this device only, so sign in to see it on the leaderboard.

Why it helps

Practising the order of operations stops the most common mistake in long sums, so multi-step questions come out right.

Free for every student, with no sign-in needed. For Class 4-9.

Best round score this week. Resets every Monday at midnight (IST).