Here are some practice problems on prime numbers that will help you clear the concepts and also improve your performance: Q1. Source: NCERT Book Practice Questions on Prime Numbers Moreover, we have provide images, charts as well as some solved examples for the better understanding of students. We have listed all 25 of these prime numbers here for students’ reference. There are 25 Prime Numbers Between 1 to 100. Having an awareness of the common prime numbers between 1 and 100 will help students in solving math problems involving division and factorisation easily. In younger classes, kids often waste a lot of time trying to find factors for numbers such as 67, 79, and 97 without knowing that they are primes. The smallest prime number is 2 and the largest known prime number (as in November 2020) is 2 82,589,933 − 1, which is obtained by multiplying 2 to itself 82,589,933 times and subtracting 1 from the product. However, 10 is not an example of a prime number because 10 has two ore factors, namely 5 and 2 other than itself and 1. Seven (7) is an example of a prime number because it can only be perfectly divided by 1 and 7.
A prime number is has only two factors – itself and 1.
Any number that divides a bigger number exactly is called a factor of that bigger number. As per the definition stated in NCERT Books, a prime number is a number that is greater than 1 but can only be divided by itself and 1 without leaving any remainder.