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Q: How do you tell if a number is divisible by 3?

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No, this number is divisible by 3 and hence is not a prime number. You can tell that fast by adding the individual digits. If that sum is itself divisible by 3, as this one is, then the number itself is divisible by 3.

You can tell if the sum of the digits can be divided by 3.

If it's divisible by 3 and 4, it's divisible by 12.

If it's even and divisible by 3, it's divisible by 6.

Yes, it is a composite number. It's divisible by 3. A quick way to tell if a number is divisible by 3 is to add up all the digits in the number. If their sum is divisible by 3, then the number is divisible by 3. For example, 4 + 2 + 3 = 9, and 9 is obviously divisible by 3. So, 423 must be divisible by 3. 423 divided by 3 is 141.

No, it is not evenly divisible by 3. The answer you get is 6,665.3333. A trick to tell is a number is divisible by 3 is to add up the digits and see if they are divisible by 3. In this case, 34 is not divisible by 3.

If the sum of the digits is a multiple of 3, the whole number is divisible by 3.

6, 9, 12, 30, 60, 90, 360, 690, 930, or (162,591). Here's a secret: If the sum of a number's digits is divisible by 3, then the number is divisible by 3. That's how you can tell quickly that 162,591 is divisible by 3.

Not evenly. An easy way to tell is that its digits add up to 7, a number which is not divisible by 3.

If the sum of its' digits are divisible by 3 for all numbers greater than 9.

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.

Yes, 18 times 3 = 54. There is a very easy way to tell if a number is divisible by 3. Add up the digits in the number. If the sum of the digits is divisible by 3, then the number is divisible by 3. For example, 5 + 4 = 9, and 9 is obviously divisible by 3. So, 54 is too.

You can tell a number is divisible by 3 when the sum of its digits is equal to 3 or a multiple of three. In this instance, 1 + 2 + 9 = 12/3 = 4, therefore 129 is divisible by 3.

If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.

Divide it by 3. In this case, 342 IS divisible by 3, because we get 114 instead of a fraction.And the quicker way is: Add the digits: 3+4+2 = 9If the sum of digits is divisible by 3 then the number is divisible by 3. 9 is divisible by 3 so is 342.

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=6If the sum of the digits is divisible by 3, the number is also divisible by 3. Or just do the division.

There is no such number. Since 6 is divisible by 3, then any number that is divisible by 6 automatically has to be divisible by 3.

Using the divisibility rules, we can tell that 6111 is divisible by 3 (The digits when added together equal 9, which is divisible by 3, so 6111 is divisible by 3). Since 3 is a factor, it is a composite number (a number with more factors than 1 and itself).

You can add up the digits, 6+4+2=12 and if that number is divisible by three, so it the original number. So 12 is certainly divisible by 3 so that means 642 is also.

429 is a composite number because it is divisible by 3 in addition to 1 and itself. It is easy to tell that it is divisible by three because the sum of its digits is divisible by 3: 4 + 2 + 9 = 15.

Yes. 33 = 3 * 11. You can tell it's divisible by 3 because adding the digits together gives six, which is divisible by 3.

35 is not divisible by 3.

No, you can tell just by looking at it that it is divisible by 3 and 9.

1. Sum of digits (12) is divisible by 3, so number is divisible by 3 2. It's an even number so it's divisible by 2 3. If it's divisible by both 3 and 2 then it's divisible by 3 x 2, ie 6.

If the sum of the digits of a number is divisible by 3 ,then the number is divisible by 3.. is 36 is right