data extraction mobile num from excel

I need to extract numbers from multiple excel sheets. I have around 500 excel sheets with multiple numbers. you need to extract all mobile numbers 10 digits (from indiya.) Put all in 2 different workbooks with different sheets, each sheet having 50,000 [login to view URL] duplicates and keep all valid 10 digit ones. Some sheets already have numbers extracted, just need to validate 10 digits. Very easy job for excel experts. only low budget bids please.