i got this brainteaser from a friend. find the missing number he said. so he gave me a set of number from 1-10000. looking at the set of number already made me felt queasy. so please give me a formula..
USe search logic on a word document, so do ctrl+f and do a each digit 0-9, one digit will have one less than normal. with this use the original number and ad another digit 0-9 to it and you will find it