TODAY’S STICKELERS ANSWER

The answer is 14. The smallest value for n so that 5n is a square is 5. 75np can now be written as 75 x 5 x p. Now break this down into factors. This gives prime factors — 3 x 5 x 5 x 5 x p. To make the expression a perfect cube, p will have to have factors 3 x 3, so we now know p = 9 n + p = 5 + 9 = 14