Brain Sharp level 140 answers are here. We have doublechecked the answers to ensure it is correct. However, sometimes the game is updated and the answers become out of date. If you find it incorrect, please let us know so we can fix it.
To solve 7+3=?, look at the other equations. each equation is (x+y)(x-y) which is why 5+3 equals 28, because (5+3)(5-3)=28. so (7+3)(7-3) = 410.