self Maths Puzzle

4+7=1281
4+6=1240
8+3=1241
9+9=?

Read Solution (Total 4)

self Other Question

A 12 lt solution is 33 1/3% acid. How much water must be added to get the solution having 20 % acid. C:R:Y::W
E:A:R::L
M:A:N::?