NCERT Class 4th, Chapter 1, Building With Bricks

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59 China Apps are banned in India!!!!!. Very socking news of june 29,2020.

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It is very shocking news to everyone Indian that 59 apps of China are banned in India. As you know that for many days the relations between China and India is not going good. There is a tension on the border.  some of the banned apps are very popular in India which are following as: 1. Tiktok - Tiktok is very popular social networking app not only in India but also all over the world. In India 20 crores(200 million) are using Tiktok. Now, this is the question that what is the meaning of banned. The India users who already using apps they will capable to use continue or only new users will not be able to install apps. Let see what happens?
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WHAT IS THE PRIME NUMBER?

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Prime Number Definition: 1 st definition: A number which has only two distinct factors is called Prime Number. 2 nd definition: In other words, A number which is divided by only 1 and itself is called Prime Number. NOTE :- If we consider only   2 nd definition then we can say 1 is also prime number because 1 can be divided by 1 and itself also but           1 does not follow 1 st definition that prime number has only 2 distinct factors. So, we will say that 1 is not a prime number. Remember that if we say only 2 nd definition, it will be called uncomplete definition. So, 1 st definition is very important to define prime number.   Some facts about Prime Numbers: Ø    2 is the smallest prime number. (Note: 2 is one and only prime number which is even prime number). Ø 3 is the smallest odd prime number. Ø There are only nine ( 2,3 5, 7, 11, 13, 17 ,19, 23 ) prime numbers between 1 ...
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