Read the following facts to work out my identity:
- I am a 2-digit number
- my two digits have a difference of four
- add 13 to me and I become a square number
Who am I?
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84.
The 2nd & 3rd rows contain the following fourteen numbers:
8 13 17 25 28 36 42 45 48 55 63 64 66 80
What is the difference between the highest and lowest multiples of 5?
. . . can be found when clicking this.