13+13+13=39
2 tens and 13 ones add up to 33 because 10 +10 +13 = 33.
When you add 8 and 5 the sum will be 13. On the other hand when you add 6 and 7 the sum will be 13. That's why it's equal to 13.
6 + 7 = 13(Sum means add)
An angle and its complement have to add to 90 degrees. 77 and 13 add to 90. 13 is the complement of 77. You will also be doing supplement. They add to 180.
16+13+12+929+12+941+950
13
13 add something equals 30 = 43
39
Is this a riddle? IDK, add 11 and 2 and you get 13, which is ONE answer? Or maybe if you add 11 and 2 and divide all of that by by 13, or take 13^0?
13+13+13=39
Your answer will be 13 over 16 13 --- 16
12+9=21 21+15=36 36+13=49 49+6=55
13
21
2 tens and 13 ones add up to 33 because 10 +10 +13 = 33.
9 and 4 add up to give 13.