Difference between revisions of "2021 JMPSC Invitationals Problems/Problem 15"
(→Solution) |
|||
| Line 3: | Line 3: | ||
==Solution== | ==Solution== | ||
| − | + | 8 | |
Revision as of 15:42, 11 July 2021
Problem
Abhishek is choosing positive integer factors of 
with replacement. After a minute passes, he chooses a random factor and writes it down. Abhishek repeats this process until the first time the product of all numbers written down is a perfect square. Find the expected number of minutes it takes for him to stop.
Solution
8
