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Q: What is a counterexample of the sentence if 8 is not a factor of a number then 4 is not a factor of the number?

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the number eight

(8/4)/2=1 8/(4/2)=4

One example is 2 divided by 4 is not a whole number

4 divides 4 (once), but 4 is not divisible by 8. ■

If the number can be divided by 4 exactly then 4 is a factor. No matter how long the number is, if the last two digits of the number are divisible by 4, then 4 is a factor of the number. Conversely, if the last two digits are not divisible by 4, then 4 is not a factor.

Any number can be a factor 4 times.

Yes 4 is a factor of 16

The common factor of 4 and 9 is 1.

4 is divisible by 2 but not by 6

If the last two digits of your target number are a multiple of 4, 4 is a factor of the whole number.

Yes, because 2 is a factor of 4.

Yes, e.g. 28 can be divided by 2 and 4

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