Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2014 Question 54

Math Olympiad Vault · MathNet 2014

Question 54

Find the number of ordered quadruples of positive integers $(a, b, c, d)$ such that $a$, $b$, $c$, and $d$ are all (not necessarily distinct) factors of $30$ and $a b c d \gt 900$.