 Hello and welcome to the session. It is going to be a falling problem today. Explain why 7 into 11 to 13 plus 13 and 7 to 6 into 5 into 4 into 3 into 2 into 1 plus 5 are composite numbers. Let us write the key idea first. Composite numbers are those numbers, the solution. We have 7 into 11 into 13 plus 13 which can be written as 77 into 13 plus 13 which is equal to 77 plus 1 into 13 which is equal to 78 into 13. Therefore the given numbers has therefore 7 into 11 into 13 plus 13, 78 and 13. Also 78 is equal to 13 into 6, 78 into 13 is equal to 13 into 6 into 13, 13 into 1 into 13 is equal to 13 into 2 into 3 into 13 into 1 into 13 plus 13 is a composite number. Let us see the second number into 6 into 5 into 4 into 3 into 2 into 1 plus 5 which can be written as 42 into 5 into 24 plus 5 which can again be written as 1008 into 5 plus 5 which is equal to 1009 into 5 into 6 into 5 into 4 into 3 into 2 into 1 plus 5 into 6 into 5 into 4 into 3 into 2 into 1 plus 5 is a composite number. We understood this problem. Bye and have a nice day.