1 November 2025

• 17:4017:40, 1 November 2025 diff hist +12 m 2021 AMC 10B Problems/Problem 15 →Solution 8 (very efficient) current
• 16:0116:01, 1 November 2025 diff hist +9 m 2021 AMC 10B Problems/Problem 15 No edit summary
• 15:5915:59, 1 November 2025 diff hist −1 m 2021 AMC 10B Problems/Problem 15 No edit summary
• 15:5815:58, 1 November 2025 diff hist +829 2021 AMC 10B Problems/Problem 15 I found a very efficient solution and decided to add a solution here.