What is the sum of the first 5 numbers squared?

Answer 1

The question is ambiguous.

Does it want the sum of the squares, or the square of the sum ? They're different.

Here are both:

1). Sum of the squares: . (1)2 + (2)2 + (3)2 + (4)2 + (5)2 = 1 + 4 + 9 + 16 + 25 = 55

2). Square of the sum: . (1 + 2 + 3 + 4 + 5 )2 = (15)2 = 225