Question

Why 11×13×15×17+17is composite

Answer 1

36482 is the answer for that

Answer 2

Here by BODMAS RULE,
11*13*15*17+17=36,482
36482=2*17*29*37
Therefore 36482 has more than 2 factors other than 1 and the number itself
                      SO 11*17*15*17+17 is a composite number

Hope this helps you :)