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"Oh My God" my formulas are not working! This article covers most of the reasons for Excel formulas not working. And how to fix them.

Our spreadsheet methodology has criteria for designing, building, and validating spreadsheets to ensure that they work correctly.

Connexion is a collection of the most useful and interesting spreadsheet-related articles from the web.

This early spreadsheet, a Babylonian clay tablet c.1800 BC, contains several errors. How many errors do your spreadsheets have?

We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.

Errors in the data, formulas, or manipulation of spreadsheets could be costly, even devastating.

Spreadsheets have errors like dogs have fleas. Nine out of every ten spreadsheets suffer some error, and consequences can be severe.

Spreadsheets can be considered to be the world's most successful end-user programming language. Spreadsheet formulas are Turing complete.