School guidelines require that there must be at least two shop around for every 25 students going on the school trip how many chaperones must there be for 53 students

2*53/25 = 4.24

4 is not enough to maintain the required ratio, so there must be 5 chaperones, minimum.

Presumably, the guidelines contain additional information regarding whether the number of chaperones can be odd. Sometimes, two are required so that one can be taking care of a student while the other handles the remaining students (or calls for emergency aid). In that case, the minimum for 53 students may be 6 chaperones.

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong