# What is the least three-digit number that is divisible by three different prime numbers?

102.

### How do you explain that even without listing all the factors of a number it is easy to tell that they are composite numbers?

To know if a number is composite without listing its factors, you can use these rules: All numbers that end with 2, 4, 6, 8, and 0 (even numbers) are divisible by 2. If the sum of the digits in a number is divisible by 3, the number is divisible by 3. If the last two digits are divisible by 4, the number is divisible by 4. All numbers that have 5 in the one's…

### What are numbers that are divisible by 6?

Numbers are divisible by 6 if they are divisible by both 2 and 3. All even numbers are divisible by 2. Odd numbers are not. To see if a number is divisible by 3, add the individual digits of the number to each other and see if that number is divisible by 3. If it is, then the original number is also divisible by 3. Example: 2712, add 2+7+1+2=12 Is 12 divisible by 3? Yes…

### How do you know what is divisible by 8?

If you have a few different numbers that you are using, divide them each by 8 and if you get a whole number, that number is divisible. If you are trying to figure out what is divisible by 8, you can use a divisibility test. A number is divisible by 8 if: the number formed by the last three digits is divisible by 8. So, an example of this would be: 7, 120. This number…

### What are the divisibility rules for 1 2 3 4 5 6 9 and 10?

All whole numbers are divisible by 1. Numbers are divisible by 2 if they end in 2, 4, 6, 8 or 0. Numbers are divisible by 3 if the sum of their digits is divisible by 3. Numbers are divisible by 4 if the last two digits of the number are divisible by 4. Numbers are divisible by 5 if the last digit of the number is either 5 or 0. Numbers are divisible by…

### What numbers are divisible by 6?

All multiples of 6 Numbers are evenly divisible by 6 if they are evenly divisible by both 2 AND 3. Even numbers are always evenly divisible by 2. Numbers are evenly divisible by 3 if the sum of all the individual digits is evenly divisible by 3. For example, the sum of the digits for the number 3627 is 18, which is evenly divisible by 3 but 3627 is an odd number so the number…