Can 4 uneven numbers added together equal 15?

Answer 1

19

Answer 2

I assume by "uneven" numbers you mean "odd" numbers (like 1, 3, 15, ...)

No.

The sum of 2 odd numbers or 2 even numbers is an even number

The sum of one even and one odd number is odd

Using O for any odd number and E for any even number, the above becomes:

O + O = E

E + E = E

E + O = O

O + E = O

Using this, adding together 4 odd numbers gives:

(O + O) + (O + O) = E + E = E

Thus adding together 4 odd numbers will result in an even number. 15 is an odd number, thus no 4 odd numbers can add together to make 15.