Divisibility Rules and Applications

This video from Mumu Math introduces divisibility rules, which enhance number sense and simplify math tasks, especially fractions. The video covers rules for divisibility by 2, 3, 4, 5, 6, 9, and 10, providing examples for each. Understanding these rules can save time and improve math skills.

Why are divisibility rules important in mathematics?

• They make calculations more complex.

• They help in understanding number sense and simplify math problems.

• They are not important at all.

• They are only useful for advanced mathematics.

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Which of the following numbers is divisible by 2?

• 135

• 246

• 123

• 357

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A number is divisible by 3 if:

• It ends in 3.

• The sum of its digits is divisible by 3.

• It is an even number.

• It ends in 0.

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What is the rule for a number to be divisible by 4?

• The last two digits form a number divisible by 4.

• The number is even.

• The sum of the digits is 4.

• The last digit is 4.

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Which number is divisible by 5?

• 123

• 250

• 367

• 482

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For a number to be divisible by 6, it must be divisible by:

• 2 and 3

• 3 and 4

• 5 and 6

• 4 and 5

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What is the rule for a number to be divisible by 9?

• The number is odd.

• The number ends in 0.

• The sum of its digits is divisible by 9.

• The number ends in 9.

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Which of the following numbers is divisible by 10?

• 789

• 1000

• 456

• 123

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How can learning divisibility rules benefit you in the long run?

• They make math more difficult.

• They help you become a better math student.

• They are only useful for specific problems.

• They have no real benefit.

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What should you do after watching the video?

• Forget about the rules.

• Share and subscribe to the channel.

• Ignore the content.

• Only watch once.

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