 Hello and welcome to the session. In this session we discussed the following question which says write all the pairs of twin primes between 50 and 80. Before we move on to the solution for this question, let's see what is twin primes. Let us define this term. Two consecutive prime numbers are known as twin primes. This definition is used as the key idea for this question. Let's see the solution now. We need to find the pairs of twin primes between 50 and 80. First of all let's see the odd numbers between 50 and 80. We have the odd numbers between 50 and 80 are given as 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77 and 79. These are the odd numbers between 50 and 80. To find the pairs of twin primes between 50 and 60, we need to find the two consecutive odd prime numbers from the given odd numbers between 50 and 80. So as you can see we have 59 and 61 are the two consecutive odd prime numbers. So one pair would be 59, 61. Now let's look for another pair. Then we have 71, 73 is another pair of two consecutive odd prime numbers. So these two are the twin primes or you can say are the pairs of twin primes between 50 and 80. So 59, 61 and 71, 73 is our final answer. This completes the session. Hope you have understood the solution of this question.