The sum of the first n cubed numbers is the square of the nth triangular number.
171700
The sum of the first four prime numbers is 17.
The sum is 17.
It is the sum of the areas of its four faces.
It is 46.
The sum of the first n cubed numbers is the square of the nth triangular number.
171700
The sum of the first four prime numbers is 17.
The sum of the first four prime numbers is 17.
the answer is of course 12
The sum is 17.
16
twenty
1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.
There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.
It is the sum of the areas of its four faces.