Questions & Answers for: Vivendi 81 2 3 6 4

5+4=23 8+1=63 6+16=32 9+9=78 3+9=6 3+81=? To find the answer, take the square of the first number and subtract from it the square root of the second number: 5 squared is 25 sgrt of 4 is 2; 25-2=23 9 ...

If 5+4=23,8+1=63,6+16=32, what is 3+81=? answer 18. a^2-b^0.5= 3^2+81^0.5=18 hey.. just checked this old question and needed to reply. The formula given by nir cohen is correct, although the answer is