Hello everybody !

It seems to me there is a minor in STEP I assignment 7 STEP question solution.

In the solution, it's said : "You can then use (k(1) + 1) (k(2) + 1) (k(3) + 1) (k(4) + 1) = 1323 to eliminate everything but three values (the three solution values, 2; 6 and 8). However, I think -4 is also a possible value since -4 | 576; (-4 - 1) | 173; and (-4 + 1) | 1323.

Personally, while answering this question I ended with 4 possible values : -4; 2; 6 and 8 and I then had to underline that we could either have 2; 6; 6; 8 or -4; -4; 6; 6 as values of k(1); k(2); k(3) and k(4) so that their product would equal 576.
I then showed that only the first case did not contradict the (...) = 175 equation.

Am I wrong ?

Anyway, thanks for this website - it's really helpful to prepare !