Given the following determine the set AnC'

Question

U={x|x€N and x<11}

A={x|x€N and x is odd and x<11}

C={x|x€N and x<9}

Answer 1

You are looking for the intersection of A and not C. Your answer must show up in both groups. 

A is less than 11 and odd.   

If C is less than 9, C' are the numbers 9 and greater. 

So what natural numbers are odd, less than 11 and also equal to or greater than 9?  Just one number fits this.