In this particular number puzzle, three UNIQUE digits must be used to arrive at a specified target number, 42. The formula is always the same – multiply two numbers together, then either add or subtract the third number to achieve your target.
- (a×b)±c, where a, b and c are three unique digits from 1-9.
One way of making 42 is (9×4)+6; can you find the only other TWO ways to make 42?
[Note: (9×4)+6 and (4×9)+6 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 5th & 6th columns of the playing board contain the following fourteen numbers:
7 8 11 14 18 25 30 36 40 44 49 54 64 84
What is the difference between the highest and lowest multiples of 4?
. . . can be found when clicking this.