This video verifies that 10 factorial seconds equals 6 weeks of time.
This playlist contains Grade 6 common core math problems. I will be adding more videos to this playlist. This would be a great review for summer time for students.
This video explains how to determine which coin out of 6 identical coins is light using only 2 weighings on a balance scale.
This video explains how to obtain exactly 6 liters of water only using a 7 liter and 11 liter container.