0

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

Updated: 9/16/2023

Wiki User

14y ago

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

Wiki User

14y ago

Earn +20 pts
Q: How can you tell whether a number is divisible by 3?
Submit
Still have questions?
Related questions

### 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.

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

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

### 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.

### Is 19 divisible by 3?

Any number is divisible by any other number - that's mathematics. However, if you are asking whether 19 is EVENLY divisible by 3, the answer would be no.

### What are the last numbers so that 3 is the divisible?

Divisibility if a number by 3 is not determined by its last digits: instead it is determined by the number's digital root.You get the digital root of a number by adding together all its digits. If the answer is a big number, then find the digital root of the answer. Keep going until you have a number that is smaller than 10. If this number is 3, 6 or 9 (all divisible by 3) then the original number is divisible by 3. And it not, it is not.

### 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.

### 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.

### Is 1218 divisible by 3?

Yes, it is. Your answer is 406. You can determine whether a number is divisible by 3 by adding the digits. If the sum of the digits (in the above, 1+2+1+8 = 12) equals 3, the number is divisible by 3.

### How do you know if a number is divisible by 6?

Quickly check to see whether it's divisible by both 2 and 3. Here's how to do that easily: -- The number is divisible by 2 if it's an even number . . . the last digit is 2, 4, 6, 8, or 0. -- The number is divisible by 3 if the sum of its digits is divisible by 3.