1.print the sum and product from 1 to 20. 2.print the numbers which is not divisible by 3 , from 1 to 20. 3.print even numbers between 1 and 20. 4.print average of numbers from 1 to 20 (should work for any numbers) 5.for numbers from 1 to 20 check if the number is divisible by 2,3 or 5 or all the three or none of the three (should work for any range of numbers)