Divisibility Tests for 2, 3, 5, 7 and 11
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Lesson Description:
This shows you the divisibility tests for 2, 3, 5, 7, and 11, so you can tell if those numbers are factors of a given number or not without dividing.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How can you test a number for divisibility with 2, 3, 5, 7, and 11?
- How can you tell if a number is divisible by 2, 3, 5, 7, or 11?
- How can you tell if a number is a factor of another number without having to do division?
- What are the tests for divisibility?
- How can you tell if a number is divisible by 2?
- How do you know if 2 goes into a number?
- How can you tell if a number is divisible by 3?
- How do you know if 3 goes into a number?
- How can you tell if a number is divisible by 5?
- How do you know if 5 goes into a number?
- How can you tell if a number is divisible by 7?
- How do you know if 7 goes into a number?
- How can you tell if a number is divisible by 11?
- How do you know if 11 goes into a number?
- What is the trick / test for figuring out if 3 goes into a number without dividing?
- What is the trick / test for figuring out if 7 goes into a number without dividing?
- What is the trick / test for figuring out if 11 goes into a 3-digit number without dividing?
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Staff Review
This lesson shows you all of the tricks / tests to determine if a number is divisible by 2, 3, 5, 7, or 11. These tests are very useful for determining which prime numbers are factors of a given number without dividing. Several examples of each type are shown. -
Mrs. B
I am the mother of a 12 year old with executive functioning problems. Since I have not been in 5th grade for a very long time, this site helped refresh my memory. Now I can help my son with his homework. This also gives my son the opportunity to watch and hear up close. Thank you.
