How do you get ten with 0.7 1.4 2.1 3.5 4.9 6.3?

Answer 1

eventually the sun will die

Until then, the answer is [(4.9 + 2.1)*(6.3 + 0.7)]/(3.5 * 1.4)=10.

Note that, since 7 is not a factor of 100, addition and subtraction won't be enough; there must be some multiplication and division by a power of 7 to get 100.


3.5 * 1.4 = 4.9. If we can get the numerator to be 49 (=100*0.7*0.7), the fraction will evaluate to 10.


Note that 4.9+2.1 = 7 = 10 * 0.7


and


6.3 + 0.7 = 7 = 10*0.7


So [(4.9 + 2.1)*(6.3 + 0.7)]/(3.5 * 1.4)= 10 * 0.7 * 10 * 0.7 / (4.9) = 10.