Math Problem Statement
128
Solution
Let's apply the divisibility tests to the number 128 for 2, 3, 4, 5, and 6.
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Divisibility by 2:
- A number is divisible by 2 if its last digit is even.
- The last digit of 128 is 8, which is even.
- 128 is divisible by 2.
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Divisibility by 3:
- A number is divisible by 3 if the sum of its digits is divisible by 3.
- The sum of the digits of 128 is 1 + 2 + 8 = 11.
- 11 is not divisible by 3.
- 128 is not divisible by 3.
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Divisibility by 4:
- A number is divisible by 4 if the last two digits form a number divisible by 4.
- The last two digits of 128 are 28.
- 28 is not divisible by 4.
- 128 is not divisible by 4.
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Divisibility by 5:
- A number is divisible by 5 if its last digit is 0 or 5.
- The last digit of 128 is 8.
- 128 is not divisible by 5.
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Divisibility by 6:
- A number is divisible by 6 if it is divisible by both 2 and 3.
- 128 is divisible by 2 but not by 3.
- 128 is not divisible by 6.
In summary, 128 is divisible by 2 but not by 3, 4, 5, or 6.
Would you like more details or have any questions? Here are some related questions for further practice:
- Is 360 divisible by 2, 3, 4, 5, and 6?
- Is 275 divisible by 2, 3, 4, 5, and 6?
- Is 144 divisible by 2, 3, 4, 5, and 6?
- Is 123 divisible by 2, 3, 4, 5, and 6?
- Is 512 divisible by 2, 3, 4, 5, and 6?
- Is 675 divisible by 2, 3, 4, 5, and 6?
- Is 100 divisible by 2, 3, 4, 5, and 6?
- Is 90 divisible by 2, 3, 4, 5, and 6?
Tip: For quick checks, remember that a number divisible by 6 must pass both the divisibility tests for 2 and 3.
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Math Problem Analysis
Mathematical Concepts
Number divisibility
Formulas
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Theorems
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Suitable Grade Level
Grades 6-8