11.5 (40/0.5) + 12 = 80+12 =92 92/8 =11.5
(40/(1/2)+12)/8=11.5
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?