The objective of Same 1x1 Game is to clear away the tiles in such a way that the maximum number of points is achieved. You can remove tiles by moving over numbers that have a common factor and then tapping the selection.
As long as you dont lift your finger you can select as much numbers as you like. You can easily select groups of two or more tiles that are connected horizontally, vertically or diagonally. If you want to clear the selection just tap outside the selection.
When you remove a group, any tiles above them fall down to fill the gaps. The more tiles you remove in one tap, the more you score. In general, removing N tiles in one tap scores N x [greatest common factor] points.
But watch out: sometimes you get more points if you remove tiles in separate groups that have bigger factors. If you select the numbers 2, 4, 6, 10, 20, 30 in one stroke you get 6 x 2 = 12 points. You better remove the numbers 2, 4, 6 and 10, 20, 30 in two strokes: 2,4,6 give 3x2 points, 10,20,30 give 3x10 points, together 36 points!
The red tiles are prime numbers, which are mixed in as an obstacle. If you try to remove a prime number together with a "normal" number you will loose 50 points. Ditto if not all selected numbers have a common factor.
As a special bonus you get 10 points for each red tile if you succeed in removing 6 or more primes in a row or column (sorry, no diagonals allowed).
You can choose from 3 game modes:
In "Until no move left" mode you can remove tiles as long as there are matching tiles left.
In Endless mode the board will be filled with new tiles as soon as tiles are removed. You can play for ever.
The field in the 1-minute-sprint looses its floor after 60 seconds. How many points you can get under time pressure?
For each of the different games there are separate highscores, where you can see your progress in training the time tables or compare your score against other players.
What is is good for?
Kids learn the best when they play a game. To reach a high score in the Same 1x1 Game they have to know their times tables. Otherwise they miss the big point boosters like 27,81 (adds 2*27=54 points) or 14,56,70 ( adds 3*14=52 points). These are the fractions you can cancel in math: 27/81 equals 1/3, 14/70 equals 1/5, ...
By the way: playing the game strenghtens your concentration, memory and strategic thinking. If you want to exceed the higscores you have to find the doubles (60/60, 48/48,...), the halves (64/32, 90/45) and you need to remove several strategic tiles to bring other high scoring combinations together.