It shouldn't be! :rofl: The only way the first three lines can be true is that the base is not ten. But it has to be very close to ten as the third line is very close to the correct addition for base ten: i.e., in base ten, 142+468=610. Since the result obtained above is larger then the base ten result, the base for the problem must be less than ten. Secondly, the base must be odd! Note that the third line has even numbers in the units place and the sum is odd in the units place therefore the change in parity of the units place must come from the higher entries.bblueblob said:Can any one help me figure out this very hard math puzzle???
2 + 2 = 4
4 + 4 = 8
142 + 468 = 621
3762 + 8271 = ?
PS. It is very confusing!