# Is 0.4 a whole number?

Last Updated : 01 Sep, 2021

Number System, any of various sets of symbols and therefore the rules for using them to denote numbers, which are wont to state what percentage objects are there during a given set or in other words Number system is a mathematical presentation of numbers of a given set. The most common number system used in mathematics is the decimal number system. There are many types of numbers in the decimal system based on their characteristics, for instance, there are real numbers, rational and irrational numbers, integers, whole numbers, natural numbers, and so on. Let’s learn in detail about the whole numbers.

### Whole Numbers

The whole numbers are a part of the number system which includes all the positive integers from 0 to infinity. These numbers exist in the number line. Hence, they are all real numbers. The complete set of natural numbers alongside â€˜0â€™ are called whole numbers. Natural numbers also known as counting numbers are a subset of the whole numbers.

0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , …âˆž are whole numbers.

### Is 0.4 a whole number?

The answer is NO, 0.4 is not a whole number.

How does one check if variety may be a whole number?

Multiply it by 10 and then do a division with 10, and check if result of that two operations is zero. Result of that two operations will offer you first digit after the percentage point .

If result’s adequate to zero then the amount may be a integer .

Let’s check it for 0.4

Multiply 0.4 by 10 which gives us 4

Now divide it with 10 i.e., 4/10 = 0.4

The first digit after the decimal point is 4, therefore 0.4 is not a whole number.

### Similar Problems

Question 1: Check whether 156 is a whole number or not?

Solution:

Multiply 156 by 10 which gives us 1560

Now divide it with 10 i.e. 1560/10 = 156.0

First digit after the decimal point is 0 , therefore 156 is a whole number.

Question 2: Can we say that every integer is a whole number?

No, every integer is not a whole number as integers can be negative i.e. -4 , -57 and many more but whole numbers cannot be negative.

Question 3: Can we say that every natural number is a whole number?

Yes , every natural numbers are whole numbers.

Question 4: Is 1/4 is a whole number?

Solution:

1/2 = 0.25

Multiply 0.25 by 10 which gives us 2.5

Now divide it with 10 i.e. 2.5/10 = 0.25

First digit after the decimal point is 2 , therefore 1/4 is not a whole number.

Question 5: State whether the given statement is true or false?

“If a number is divisible by 2, then it is a whole number.”

False

As, -4 is also divisible by 2 but it is not a whole number.