-21, 27
99
251
-3888
99
-117
The two equal numbers that have a sum of 54 are 27 and 27. When you add these two numbers together, you get 54. This is because the sum of two equal numbers will always be double the value of one of the numbers. In this case, 27 + 27 = 54.
-21, 27
391
99
135 = 3 x 45 or 5 x 27 or 9 x 15 None of these pairs add to 27.
29
251
This is not possible, 27 is an odd number, 4 odd numbers will always equal an even number.
27
27 + 27
-3888