Math Box Balance

Math Box Balance sets out a row of boxes, each holding four number blocks, with the total of those four shown inside the box. The goal is to make every box show the same sum.

You get there by swapping blocks between boxes. Taking a block out of one box and putting a different block in changes both totals at once, so each swap is a small sum in itself: whatever one box gains, the box it traded with loses.

Early levels start with just two boxes. As you progress the count rises, up to a maximum of eight. The game is endless, with difficulty climbing over time and your score rising as you go. Since each box always holds four blocks, a swap is a straight trade rather than a way to pile numbers into one place.

Look at the sum shown in each box. Using a mouse or touchpad, swap number blocks from one box with blocks in another to change their totals. Keep trading until every box displays the same sum, which completes the level. More boxes join as you advance, starting from two and reaching eight, and the game carries on without an end.

Swapping never changes the grand total of all the blocks, so add the box sums together and divide by the number of boxes: that is the figure every box has to reach. Then compare each box with that target, and look for a pair of blocks whose difference closes the gap on both sides.

A number-balancing puzzle in a wide landscape frame. Each box holds four blocks, and levels go from two boxes up to eight. Play is endless with rising difficulty. The developer lists a mouse or touchpad as the input.

Reach 100 : Colors Game is also about hitting a total, sliding numbers together until every group makes 100. Crossmath Challenge asks you to place number tiles so equations work across and down.