A number is divisible by if the units digit is even - that is, it divides by without a remainder.
A number is divisible by if the units digit is even - that is, it divides by without a remainder.
First way: A number is divisible by if its last two digits are divisible by .
Second way: Multiply the tens digit by and add the units digit. If the result obtained is a multiple of , then the original number is as well.
A number is divisible by if its units digit is .
Is the number 43 divisible by 4?
In this article, we will teach you the best and simplest tricks to identify if a number is divisible by , by , and by .
Shall we start?
A number is divisible by if its units digit is even.
Let's remember that an even digit is one that can be divided by without leaving a remainder.
If the units digit is odd, we can determine, without a doubt, that the number is not divisible by .
Divisibility by 2 - example 1
The number
Let's observe the units digit
is even, therefore, we can determine that the number is divisible by .
Divisibility by 2 - example 2
The number
Let's observe the units digit .
is odd, therefore, we can determine that is not divisible by .
Divisibility by 2 - example 3
Determine if the number is divisible by .
Solution:
The units digit is , even, therefore, the number is divisible by .
Divisibility by 2 - example 4
Determine if the number is divisible by
Solution:
The units digit is , odd, therefore, the number is not divisible by .
Is the number 42 divisible by 2?
Is the number 30 divisible by 10?
Is the number 8 divisible by 2?
To find out if a certain number is divisible by we will teach you ways to do it:
Divisibility by 4, (First method) - example 1
The number
The last two digits are . is divisible by , therefore, we will determine that is divisible by .
Divisibility by 4, (First method) - example 2
The number
The last two digits are . is divisible by , therefore, we can determine that is as well.
Divisibility by 4, (First method) - example 3
The number
The last two digits are . is not divisible by , therefore, we will determine that is not either.
Is the number 21 divisible by 4?
Is the number 61 divisible by 10?
Is the number 16 divisible by 2?
Multiply the tens digit by 2 and add the units digit. If the result is a multiple of 4, the original number is also.
Divisibility by, (Second method) - example 1
The number
Let's multiply the tens digit by and add the units digit :
is divisible by , therefore, we will determine that is as well.
Divisibility by, (Second method) - example 2
The number
Let's multiply the tens digit by and add the units digit :
is divisible by , therefore, we will determine that is also .
Divisibility by, (Second method) - example 3
The number
Let's multiply the tens digit by and add the units digit :
is not divisible by therefore, we will determine that is not either.
A number is divisible by if its units digit is .
Divisibility by 10 - example 1
Is the number divisible by ?
The units digit is therefore, we can determine that is divisible by .
Divisibility by 10 - example 2
Is the number divisible by ?
The units digit is and not . Consequently, the number is not divisible by .
Divisibility by 10 - example 3
Is the number divisible by ?
The units digit is , therefore, we can determine that the number is divisible by .
Is the number 16 divisible by 4?
Is the number 60 divisible by 4?
Is the number 60 divisible by 10?
In third grade there are students, in third grade there are students, and in third grade there are students.
If we have balloons, in which grade could the balloons be distributed equally, without any remainder?
Answer: in all grades.
Solution:
Let's see if the number is divisible by .
Take the last pair of digits . is divisible by , therefore, is divisible by .
Let's see if the number is divisible by .
The units digit is even, therefore, is divisible by .
Let's see if the number is divisible by .
The units digit is , therefore, the number is divisible by .
Is the number 43 divisible by 4?
No
Is the number 42 divisible by 2?
Yes
Is the number 30 divisible by 10?
Yes
Is the number 8 divisible by 2?
Yes
Is the number 21 divisible by 4?
No
Is the number 15 divisible by 2?
Is the number 10 divisible by 4?
If a number is divisible by 4, is it necessarily also divisible by 2?