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Excel's Custom Data Validation: A Trick You Didn't Know You Needed

If you've used data validation in Excel before, you probably selected the relevant cells, clicked "Data Validation" in the Data tab on the ribbon, and created the rule in the Data Validation dialog ...

How to clear your Android phone cache (and fix slow performance for good)

This simple tweak can noticeably boost speed and responsiveness on nearly any device - no matter the brand. Here's how to do it.