Grades 9-10 Video Solutions 2010-Levels 9&10 Video Solutions 2010 problem15

Levels 9&10 Video Solutions 2010 problem15

Video Transcription

Video Summary

The video transcript discusses a problem-solving exercise related to determining the weekday of the 21st in a month with specific conditions. The problem states the month has three Tuesdays on even-numbered days. By calculating potential starting days for Tuesdays, it deduces that if Tuesday falls on the 2nd, then the 9th, 16th, 23rd, and 30th also are Tuesdays, meeting the criteria. Thus, if the 23rd is a Tuesday, the 21st is deduced to be a Sunday. Hence, the correct answer is Sunday, choice E.

Keywords

problem-solving

weekday determination

Tuesdays

21st

Sunday