0

# How can you tell if a number is divisible by 3?

Updated: 4/28/2022

Wiki User

13y ago

Best Answer

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

Wiki User

13y ago
This answer is:

## Add your answer:

Earn +20 pts
Q: How can you tell if a number is divisible by 3?
Write your answer...
Submit
Still have questions?
Related questions

### How do you tell if a number is divisible by six?

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

### Is 345456543 a prime number?

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.

### Is 19996 divisible by 3?

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.

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

If the sum of the digits can be divided by 3. 93 is divisible by 3 because 9+3=12 we know 12 is divisible by 3 because 1+2=3 so the number is divisible by 3.

### How can you tell if a number is divisible by 6?

If the number is divisible by 2 and 3, it can also be divided by 6.For example - 12126 is divisible by 2 and 3 and6Divide it by 6 and see if you get a whole number.

### Which divisibility rule would you apply to tell whether a number is divisible by 3?

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

### Is 423 a composite?

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.

### What is a divisible number 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.

### How can you tell if a number is divisible by 12?

If a number is divisible by both three and four, it's divisible by twelve.

### Is 2131 divisible by 3?

Yes, 2131 is not divisible by 3. The sum of its digits (2+1+3+1=7) is not divisible by 3, so the number itself is not divisible by 3.

### How can you tell whether a number is divisible by 3?

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

### 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.