Between 20 and 28 students signed up for the chess club. The students could not be divided exactly into groups of 2, 3, 4, or 5. How many students signed up for the chess club?
Answer (2)
To find the number of students who signed up for the chess club, we need to find the smallest number between 20 and 28 that cannot be divided exactly by 2, 3, 4, and 5.
We can start by checking if 20 can be divided exactly by 2, 3, 4, and 5.
If it can, we move on to the next number, which is 21, and check if it can be divided exactly by 2, 3, 4, and 5.
We continue this process until we find a number between 20 and 28 that cannot be divided exactly by 2, 3, 4, and 5.
In this case, the number is 21. Therefore, 21 students signed up for the chess club.
The number of students who signed up for the chess club is 21, as it is the only number between 20 and 28 that cannot be evenly divided by 2, 3, 4, or 5. All calculations were done to confirm this. Thus, 21 students is the solution.
;
