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you add the numbers together and if that is divisible by three then so is that number

for example: the number 111, you would do 1+1+1=3 so 111 is dividable by 3; or the number 1,620, 1+6+2+0= 9 (which is divisible by 3) so 1,620 is divisible by 3

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Q: How do you determine whether a number is divisible by three?
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What is a quick way to determine if 3 is a factor of a number?

If the sum of the digits of a given number is divisible by three, the number is divisible by three.


How can you determine a number could be divided by 15?

If it's divisible by three and five, it's divisible by fifteen.


How do you determine if 1041 is a prime number?

Since its digits add up to a multiple of three, it's divisible by three. That means it's not prime.


What are signs that a number is divisible by 3?

If all the digits in a number add up to a number divisible by three, the number itself is divisible by three.For example the number 711: 7 + 1 + 1 = 9. Nine is divisible by three, therefore 711 is divisible by three.


What is the rule to determine if a number is divisible by 12?

That the number is divisible by 4* and the sum of its digits is a multiple of 3. *If the number has three of more digits then it is only necessary to look at the tens and units to determine if it is divisible by 4, as 4 is a factor of 100 and therefore of any multiple of 100. Examples : 75 : is not divisible by 4 although its digits total 12 which is a multiple of 3. 132 : is divisible by 4 as 32 is divisible by 4, and its digits total 6 which is divisible by 3, then 132 is divisible by 12.


What is the converse inverse and contrapositive If every digit of a number is divisible by 3 then the number is divisible by 3?

Converse:If a number is divisible by 3, then every number of a digit is divisible by three. Inverse: If every digit of a number is not divisible by 3 then the number is not divisible by 3? Contrapositive:If a number is not divisible by 3, then every number of a digit is not divisible by three.


If the ............. of the digits for a whole number is divisible by three then the whole number is also divisible by three?

You would fill in the blank with the word sum, which means that you add each of the digits of the number. If that sum is divisible by three then the number is divisible by 3.


Is 744 divisible by 3?

The question wasn't "what is 744 divided by 3?" The question was, "Is 744 divisible by 3?" The answer is, "Yes." In fact, ANY number is divisible by three, but the answer may not be a whole number (e.g. 745 divided by 3 is 248.33333....). Here's a tip. To determine quickly whether any given number is equally divisible by three, add the digits. If that answer has two or more digits, add them. Keep doing this until you get a one-digit answer. If THAT one digit is divisible by three, so is the original number. Obviously, the one digit would be a 3, a 6 or a 9. Example 1: Is 2,169 divisible by 3? 2+1+6+9=18 1+8=9 Nine IS divisible by three so, yes, 2,169 is divisible by 3. Example 2: Is 8,075 divisible by 3? 8+0+7+5=20 2+0=2 Two is NOT divisible by three so, no, 8,075 is not divisible by 3.


What is the greatest three digit number that is divisible by 7?

The greatest three digit number that is divisible by 7 is 994.


What is the least 4-digit number that is divisible by 3?

1


Is there a number divisible by 6. But not 3?

yeah3 9 15 21 27 and so on(every other multiple of three)But if you have a large number, like 755253, and don't have a calculator handy, then use sum of digits to determine if divisible by 3.Then if the number is divisible by 3 and divisible by 2, then it is also divisible by 6.So in this case: 7 + 5 + 5 + 2 + 5 + 3 = 27, which is divisible by 3, but the original number is odd, so the number is not divisible by 6.


How would you reconise a multiple of three?

if the number is a 2 or more diget number, you add up all of the numbers in the number and when you have the sum, if the sum is divisible by 3 , the whole number is divisible by three EX. 123=6, 6 is divisible by 3 so 123 is divisible by three 447=15 is divisible by 3 so 447 is divisible by 3 989=26 is *NOT* divisible by 3 so 989 is not divisible by three this truly does work for every single number