Explain why 7 x 11 x 13 + 13 and 7 x 6 x 5 x 4 x 3 x 2 x 1 + 5 are composite numbers. Explain why 7 x 11 x 13 + 13 and 7 x 6 x 5 x 4 x 3 x 2 x 1 + 5 are composite numbers. October 3, 2020 Category: Chapter 1 - Real Numbers , Exercise 1.1 , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related