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Yes.

1 + 2 + 9 = 12 12 is divisible by 3. If the sum of the digits of a number are divisible by 3, then the whole number is divisible by 3. 129 is a composite number because it divisible by a factor other than 1 and itself.

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Q: Is 129 a composite number
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Related questions

Is 129 prime or composite?

129 is divisible by three, hence it is a composite number.


Is 129 a prime numr?

129 is a Composite Number.


Is 129 a prime number or a composite number?

It is composite. It is divisible by 3.


How do you get 129 to be prime?

129 is not a prime number because it has more than two factors and so therefore it is a composite number


Is the number 129 prime or composite?

129 is divisible by 3. 1+2+9=12 and 12 is divisible by 3. That is the rule of divisibility by 3.


What is the difference between the sum first ten prime number and first ten composite number?

129 - 112 = 17


Is 516 a composite number?

As an even number greater than 2, 516 is divisible by 2 and therefore composite. Its positive integer factors are: 1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 258, 516


Is 258 a composite number?

That '8' at the end of it is an immediate tip-off. That tells you that '258' is an even number. All even numbers are composite, because they're all multiples of 2. It so happens that 258 is also divisible by 3, 6, 43, 86, and 129. Any one of these makes it a composite number. But just knowing that it's an even number was enough to tell us that.


What comes after the number 129?

After the number 129 comes the number 130. In the decimal number system, each number is one more than the number that precedes it. So, following this pattern, the number that comes after 129 is 130.


What gives you 129?

The are a number of mathematical operations that gives us the number 129. When you add 100 to 29 you will get 129. Similarly when you subtract 11 from 140, you will get 129.


Is 515 a prime number or a composite number?

It is a composite number.


Is 284 a prime or composite number?

It is a composite number.284 is a composite number