You can use the right mouse button to flip the items in the opposite order, or the item chooser to directly pick an item from the list. Press two seconds on an item to automatically choose the last item selected in this position. Double click on a previously selected item in your guess history to mark it as 'correct'. Such marked items are automatically selected in your current and future guesses until you un-mark them, by double clicking on them again.

Balance using the International System of Units

math measures scalesboard_weight

Bruno Coudoin & Timothée Giet

Balance using the imperial system of units

math measures scalesboard_weight_avoirdupois

Bruno Coudoin & Timothée Giet

All operations memory game against Tux

math memory arithmetic memory-math-add-minus-mult-div-tux

JB BUTET & Timothée Giet

Give Tux his change, including cents

math money measures money_back_cents

Bruno Coudoin & Timothée Giet