Hmm, well if you think about Riemann hypothesis, P versus NP problem, Birch and Swinnerton-Dyer conjecture, Hodge conjecture, Navier-Stokes equation, Yang-Mills theory, and the PoincarΓ© conjecture, then you complete an essay, counting each piece of sand on Earth, then you multiply all of that by the radius of the sun and then round the 1, I believe the answer would be 2 :)
1
7
2
1Γ·5-1Γ·4 = (4-5)Γ·20 =-1Γ·20
a trillion and 1
11
2
6
3464
1/8 is a rational number.
whats the ?
7 and 8