Grades 9-10 Video Solutions 2025-2025_9-10

Video Transcription

Video Summary

The video explains solving a puzzle where ABCDEF is a 6-digit number formed by 1-6 without repetition and meeting specific divisibility conditions: AB is divisible by 2, ABC by 3, ABCD by 4, ABCDE by 5, and ABCDEF by 6. Since AB, ABCD, and ABCDEF are even, B, D, and F must be 2, 4, or 6, while A, C, and E are 1, 3, or 5. E must be 5, as ABCDE ends in 5. A and C are 1 and 3. B is 2, making F = 4 and D = 6 to satisfy divisibility rules.

Keywords

puzzle

divisibility

6-digit number

permutation

logic