Posted by **anonymous** on Tuesday, July 2, 2013 at 12:58pm.

What is the largest integer less than 1000 that can be represented as a^3+b^3+c^3 for some integers a,b,c, such that a+b+c=0.

- math -
**MathMate**, Tuesday, July 2, 2013 at 4:39pm
By trial and error, I get:

11^3+(-5)^3+(-6)^3=990

If we assume the largest integer is N such that

N(a,b)=a^3-b^3-(a-b)^3

=3ab(a-b)

The likely candidates are:

990=3*11*5(11-5)... a,b,c = 11, -5, -6

993=3*331

996=3*332=3(4*83)

999=3*333=3(9*37)

All of which cannot be reduced to the form

3ab(a-b).

## Answer This Question

## Related Questions

- la sallle - There are 3 consecutive even integers such that the quotient ...
- calculus - A positive multiple of 11 is good if it does not contain any even ...
- Math - Find three consecutive even integers such that the sum of the smallest ...
- heeeeeeeeelp math - For every positive integer n consider all polynomials f(x) ...
- heeeeeelp math - For every positive integer n, consider all polynomials f(x) ...
- heeeeeeelp math - For every positive integer n, consider all monic polynomials f...
- Math (algebra) - For every positive integer n, consider all monic polynomials f(...
- math - What is the smallest of three consecutive integers if the sum of the ...
- math - What is the smallest of three consecutive integers if the sum of the ...
- heeeeeeelp math3 - For every positive integer n consider all polynomials f(x) ...

More Related Questions