1+1+1+1=4
2 odd numbers added together equal an event number. to even numbers added together equal an even number. it is impossible to make 4 odd numbers equal an even.
1 + 2 + 4 + 6 = 13
four threes
Adding 4 odd numbers together will always equal an even number - got ya!
15
4
74
64
a sum is equal to the two numbers being added together, so the sum of two and four is six or: 2+4 = 6
-66
-9
41