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Friday, May 9, 2014

Divisibility - 4

Category: Arithmetic

"Published in Newark, California, USA"

Divisibility by 4:

How do you know that a number is divisible by 4? Well, a number is divisible by 4 if the last two digits of a number are multiples of 4 or divisible by 4. Also, if the last two digits of a number are 0. You need to remember or memorize the multiplication table for this one.  

Example 1:


The first thing that we need to do is to inspect the given number if it is divisible by 4 or not. Let's examine the last two digits of a given number which is 82. 

Since 82 is not a multiple of 4, then the given number is not divisible by 4. We know that 80 is divisible by 4. There's a remainder of 2 in the division. The answer or a quotient must be a whole number itself. You should not have a fraction or a remainder in the final answer. 

Example 2:

 
The first thing that we need to do is to inspect the given number if it is divisible by 4 or not. Let's examine the last two digits of a given number which is 48. 

Since 48 is a multiple of 4, then the given number is divisible by 4. There's no remainder or a fraction in the division.

Example 3:


The first thing that we need to do is to inspect the given number if it is divisible by 4 or not. Since the last two digits of a given number are 0, then the given number is divisible by 4. There's no remainder or a fraction in the division.

You should consider in studying the divisibility of a number because you will use these principles later when you will study higher Math subjects that involves the division of a number, simplifying fractions, and even factoring. 

This method can also be used for negative integers as long as the last two digits are multiples of 4 or 0. Again, there should be no remainder or a fraction in the division.