no of true statements about 300 concerning disibility
Source: 2021 Dürer Math Competition Finals Day2 E+8 https://artofproblemsolving.com/community/c2749870_
January 9, 2022
number theorydividesdivisible
Problem Statement
Benedek wrote the following 300 statements on a piece of paper.
2∣1!3∣1!3∣2!4∣1!4∣2!4∣3!5∣1!5∣2!5∣3!5∣4!...24∣1!24∣2!24∣3!24∣4!⋅⋅⋅24∣23!25∣1!25∣2!25∣3!25∣4!⋅⋅⋅25∣23!25∣24!
How many true statements did Benedek write down?
The symbol | denotes divisibility, e.g. 6∣4! means that 6 is a divisor of number 4!.