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Answer - How do you tell if a number is divisible by 3?
you add all the digits in the number and see if that number can be divided by 3 Answer - A whole number is divisible by 3 if the sum of its digits is divisible by what?
Three (3) Examples:
* 27 -- 2+7=9 * 13452 -- 1+3+4+5+2=15 -- 1+5=6
If the sum of the digits is divisible by 3, the number is also divisible by 3. Or just do the division.
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Professorif one of its factors are a 3 or after dividing a number by 3, their are no remainders
There is also another trick: add all of the digits of the number together. The original number is divisible by 3 if and only if the sum of the digits is divisible by 3.
For example:
321 is divisible by 3 because 3+2+1=6 and 6 is divisible by 3.
322 is not divisible by 3 because 3+2+2=7 and 7 is not divisible by 3.
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Why is 138 divisible by 3?
Well, to find out if any number is divisible by 3, you add up the number's factors. If the number you come up with is divisible by 3, then the entire number is divisible by 3.For example:138= 1+3+8= 1212 is divisible by 3.
What number make 371 divisible by 3?
To determine what number makes 371 divisible by 3, we need to sum the digits of 371: 3 + 7 + 1 = 11. To be divisible by 3, the sum of the digits must also be divisible by 3. Since 11 is not divisible by 3, we need to find the number that, when added to 11, results in a sum divisible by 3. The next multiple of 3 greater than 11 is 12, so the number that makes 371 divisible by 3 is 1.
Set all Prime numbers divisible by 3?
Prime numbers are only divisible by 1 and themselves. Since 3 is not a prime number, any prime number divisible by 3 does not exist. Therefore, the set of prime numbers divisible by 3 is an empty set.
How can you tell that 42 is divisible by 3?
To determine if 42 is divisible by 3, you can add up the digits of 42 (4 + 2 = 6) and check if the sum is divisible by 3. Since 6 is divisible by 3, then 42 is also divisible by 3. This is based on the rule that a number is divisible by 3 if the sum of its digits is divisible by 3.
Are all even numbers divisible by 6?
Not all even numbers are divisible by 6. These numbers are not evenly divisible by 6: Any number smaller than 6. Any number not divisible by 3. If a number is divisible by both 2 and 3, it is divisible by 6.
