1. Find the smallest and largest number in a list 2. Find the second largest number 3. Remove duplicates from a sorted array. 1,1,1,2,3,3,4 =1,2,3,4 4. check if a list is palindromic? 5. Reverse a list of numbers 6. Find nth smallest number in list 7. Find index of smallest number in a list 8. Compare 2 lists and find the first difference 9. Partition a list between negative and positive numbers 10. Check for a subsequence in a list