If you have written the CBSE Class 10 board exam, before, please can you explain to me the exam paper lay outs?

Charlie is a car salesman he earns $800 plus a 9% commission on all of her sales for the week if charlie receive the payment for $1960 this week how much where is total sales

If i have one apple and give you the apple, how many apples do i have?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.