### 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…

### What is the greatest common factor of 123 and 234?

The greatest common factor of 123 and 234 is 3. 123: the digits (1, 2, 3) add up to 6. 234: the digits (2, 3, 4) add up to 9. So both 6 and 9 are divisible by three. More formally: The prime factors of 123 are 3 and 41, while the prime factors of 234 are 2, 3, 3, and 13. The intersection of [3, 41] and [2, 3, 3, 13] is [3], therefore…

### Which is a prime number 234 OR 788 OR 123 OR 563?

The only even prime is 2, so neither 234 nor 788 is prime. Since 1+2+3=6 is divisible by 3, the divisibility test for 3 says 123 can not be prime. If one of the options must be prime, then we know it is 563. Just to check: 563 is odd and not divisible by 3,5,7,11,13,17,19, or 23. Since it is not divisible by any primes less than its square root, we know that 563 is…

### Is 123 a prime number or a composite number?

A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 123 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 3. (You can check this by adding the digits of the…

### Is 234 divisible by 3 6 and 9?

Using the tests for divisibility: Divisible by 3: Add the digits and if the sum is divisible by 3, so is the original number: 2 + 3 + 4 = 9 which is divisible by 3, so 234 is divisible by 3 Divisible by 6: Number is divisible by 2 and 3: Divisible by 2: If the number is even (last digit divisible by 2), then the whole number is divisible by 2. 234 is…

### Is 5232 divisible by 6?

Since 5232 is divisible by both 2 and 3, it is divisible by 6. A number must be divisible by both 2 and 3 to be divisible by 6. The number 5232 is even, so it is divisible by 2. If you add the individual digits in the number (5+2+3+2=12) you get a number that is divisible by 3, meaning the original number (5232) is also divisible by 3.

### Is 684 divisible by 3 6 and 9?

Using the tests for divisibility: Divisible by 3: Add the digits and if the sum is divisible by 3, so is the original number: 6 + 8 + 4 = 18 which is divisible by 3, so 684 is divisible by 3 Divisible by 6: Number is divisible by 2 and 3: Divisible by 2: If the number is even (last digit divisible by 2), then the whole number is divisible by 2. 684 is…

### How do you know if 54132 is divisible by 6?

To determine if a number is divisible by 6, it must be divisible by both 2 and 3. To determine if a number is divisible by 2, it should be even - in other words, it should end with 0, 2, 4, 6, or 8. To determine if a number is divisible by 3, the sum of its digits should be divisible by 3. 54,132 is an even number, so it is divisible by 2…