ROW number corresponding to a data

I have two problems

1. In column A i have diffeerent values in random order (not in ascending or descending order) i want to display the row number of a pirticular cell value ?

2. I have column A and B has values in random order not in any order as above ,i want to search and display for the maximum value in a range from column A and the corresponding value (same row) in column B ?

thanks in advance

santhosh