Who was jupirer
The answer will be 5
Guess a number 1-10, multiply it by 2, now add with 54 and divide by 2. Lastly, subtract the number you guessed 1-10. What number are you left with, and what is unusual about it?
What number gives the same result if you divide it by 2 or take 2 from it? What number gives the same result if you divide it by 3 or take 3 from it?
Note: you will need to include a fraction or decimal for this one...