Three UNIQUE digits must be used to arrive at a specified target number.
Players must multiply two numbers together, then either add or subtract the third number to achieve your target answer of 25. The formula is (a×b)±c, where a, b and c are three unique digits from 1-9.
One way of achieving 25 is (8×2)+9, can you find the other EIGHT ways?
[Note: (8×2)+9 = 25 and (2×8)+9 = 25 counts as just ONE way.]
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 3rd column of the playing board contains the following seven numbers:
4 12 15 17 35 80 81
Using these seven numbers exactly once each, with + – × ÷ available to use in your calculation, can you arrive at the target number of 100?
. . . can be found when clicking this.