### How many prome number are between 1 and 100...?

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##### Answer

25

##### Explanation

What is a prime number?

A number is greater than 1 is called a prime number, if it has only two factors, 1 and the number itself.

According to the defination of prime number, the prime numbers between and 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. They are total 25.

Find the prime number from 1 to 100 just in 5 second (MATH PRIME NUMBER SHORTCUT TRICK from 1 to 100 number)
Find a large number "A" is prime number or not (MATH PRIME NUMBER SHORTCUT TRICK By using Square Root method)
Therefore there are 25 prime number between 1 and 100.

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##### Prime Number

A number is greater than 1 is called a prime number, if it has only two factors, 1 and the number itself.

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##### NUMBERING SYSTEM (MATH SHORTCUT TRICKS)

Find the prime number from 1 to 100 just in 5 second (MATH PRIME NUMBER SHORTCUT TRICK from 1 to 100 number) ?
Find a large number "A" is prime number or not (MATH PRIME NUMBER SHORTCUT TRICK By using Square Root method) ?
Find the composite number from 1 to 100 just in 5 second (MATH COMPOSITE NUMBER SHORTCUT TRICK from 1 to 100 number) ?
##### NUMBERING SYSTEM QUESTION

Is zero even number or odd number (Even, Odd, Both, Neither even nor odd)...?
What is the lowest odd prime number (2, 3, -2, -3)...?
What are the consective prime number (2 and 3, 5 and 7, 11 and 13, all above)...?
Which number is prime number (1, 39, 49, None)...?
1 is prime or composite number (Prime, Composite, both, Neither Prime nor composite)..?
Give me numbers which are neither prime nor composite (0, 1, 0 and 1, None)?
All non prime number are also the composite number. (True or False)?
Which number neither prime nor composite (1, 29, 39, None)...?
What is the largest composite number less than 20 (17,18,19,20). ?
What is largest composite number less then 30 (23, 25, 28, 29)?
The number 4, 6, 8, 9, ... are (odd, even, prime, composite number) ...?
All even number greater then 2 are composite number (True, False)... ?
How many prime number are between 10 and 30 (5, 6, 7, 8)?
How many prime number are between 1 and 100 (25, 27, 29, 31)?
Which of the following is prime number (703,731,797,729)...?
##### MATH SHORTCUTS

Addition Shortcuts
Division Shortcuts