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How can you tell if a number is divisible by four? If the last two digits of the number are divisible by four then the original number is also divisible by 4. For example, if the number is 47,128 then the last two digits of that number is 28. As 28 is not divisible by …

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How do you know if a number is divisible by three? The fastest way of determine if a number can be divisible by 3 is to add up all the digits in the number and if that number is divisible by 3 then the original number is divisible by 3. For example, suppose the original …

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