- How do you know if a number is a multiple of 3?
- Why does the divisibility rule of 3 work?
- Is every number divisible by 9 also divisible by 3?
- Can a prime number be divisible by 3?
- How many 3 digit numbers are there?
- What is the smallest 3 digit number with unique digits?
- Which three digit number less than 110 is completely divisible by 3 as well as 4?
- What is a 3 digit number divisible by 3 and 5?
- What are the 3 digit numbers divisible by 7?
- What is the highest number you can make using 3 digits?
- What is the least 3 digit number divisible by 4?
- What is the factor of 3?
- How many 3 digit numbers are there which are divisible by 3?
- What is a 3 digit number divisible by 3 and 4?
- Is the number divisible by 3 and 4?
- How do we check if 87 is divisible by 3?
- Which number is exactly divisible by 3?

## How do you know if a number is a multiple of 3?

If the sum of the digits of the number are a multiple of 3, then the number is a multiple of 3.

Here are some examples: 1113, 117, 18, 37035 are all multiples of 3..

## Why does the divisibility rule of 3 work?

The reason is that every time you go above 10, you increase the value in the tens column by 1, and decrease the value of the units by 10. The net result is that the sum of the digits decreases by 9. So it works with 3, because when you get to 12, the sum of the digits is 12-9 or 3 (which is divisible by 3).

## Is every number divisible by 9 also divisible by 3?

Every number divisible by 9 is divisible by 3. For example, 7425 is divisible by 9, hence it is divisible by 3. However, a number divisible by 3 is not necessarily divisible by 9. For example 6, 12, 15, 21, 24, 30 are all divisible by 3 but none of them is divisible by 9.

## Can a prime number be divisible by 3?

Put another way, a prime number can be divided evenly only by 1 and by itself. Prime numbers also must be greater than 1. For example, 3 is a prime number, because 3 cannot be divided evenly by any number except for 1 and 3. However, 6 is not a prime number, because it can be divided evenly by 2 or 3.

## How many 3 digit numbers are there?

How many 3 digit numbers are there? There are a total of 900 three-digit numbers.

## What is the smallest 3 digit number with unique digits?

102Thus, 102 is the smallest 3-digit number with unique digits.

## Which three digit number less than 110 is completely divisible by 3 as well as 4?

Answer. Answer: 108 is the best answer.

## What is a 3 digit number divisible by 3 and 5?

calculate the number of three digit numbers divisible by 3, 5, 11, 15, 55, 33, 165 (15, 33, 55 and 165 are LCMs of 3-5, 3-11, 5-11 and 3-5-11 respectively) using the formula that you mentioned. This will give the number of 3 digit numbers which are divisible by either 3 or 5 or 11.

## What are the 3 digit numbers divisible by 7?

∴ There are 128 3-digits number which are divisible by 7.

## What is the highest number you can make using 3 digits?

999The smallest 3-digit number is 100 and the largest 3-digit number is 999.

## What is the least 3 digit number divisible by 4?

The sum of all 3-digit numbers divisible by 4 is 123300. What is the smallest three digit number divisible by 4? The smallest or lowest 3-digit number divisible by 4 is the first number on the list above (first 3 digit number divisible by 4). As you can see, that number is 100.

## What is the factor of 3?

Table of Factors and MultiplesFactorsMultiples1, 3391, 2, 44121, 55151, 2, 3, 661841 more rows

## How many 3 digit numbers are there which are divisible by 3?

300 3Answer. 300 3-digit numbers divisible by 3. so there is an A.P. whose common difference is 3 and where the first number (i.e. a=102) and the n number is 999.

## What is a 3 digit number divisible by 3 and 4?

The smallest 3-digit number which is divisible by 3 and 4 is 108. The Largest 3-digit number which is divisible by 3 and 4 is 996.

## Is the number divisible by 3 and 4?

The lowest common multiple (LCM) of 3 and 4 is 12. That means only multiples of 12 are divisible by both 3 and 4. … There is a multiple of 12, well, every 12 numbers. Hence 9000/12 = 750.

## How do we check if 87 is divisible by 3?

Answer: We know that if the sum of the numbers that make up 87 is divisible by 3, then 87 is divisible by 3. Note: If you divide 87 by 3, you get 29 which is a whole number.

## Which number is exactly divisible by 3?

If the sum of the digits of a number is divisible by 3, then the number is divisible by 3. Some examples of numbers divisible by 3 are as follows. The number 85203 is divisible by 3 because the sum of its digits 8+5+2+0+3=18 is divisible by 3.