Y by
2019 MathCounts National Sprint #29
How many of the first
positive integers have no single-digit prime factors?
Side note: Just HOW are they supposed to solve this in like 5 minutes?
How many of the first

Side note: Just HOW are they supposed to solve this in like 5 minutes?
This post has been edited 1 time. Last edited by ilikemath247365, Mar 14, 2025, 5:44 AM
Reason: Wanted to add something
Reason: Wanted to add something