## 20% of the Formulas give 80% of the Results

### 15 06 2020

Answer to Which 20% Excel formulas give 80% of the results for data science and BI analysis? by Duncan Williamson https://www.quora.com/Which-20-Excel-formulas-give-80-of-the-results-for-data-science-and-BI-analysis/answer/Duncan-Williamson-1?ch=99&share=bd0b812a&srid=2m1N

## FUNCTIONS … top 100

### 22 12 2018

I just came across a couple of pages on hbr.org that you need to know about and forgive me if these are behind a paywall: I subscribe to the HBR so I went straight to every page.

Firstly, 10 Excel Functions Everyone Should Know by Adam Lacey and Deborah Ashby. I prefer DGET to their INDEX-MATCH function but otherwise, this is a good start to learning the top 10. Top 10 Excel Functions

Then there is a REALLY useful PDF file The Definitive 100 Most Useful Excel Tips at https://excelwithbusiness.com/blog/definitive-100-most-useful-excel-tips/

Finally and following on from the 100 must useful Excel tips, Marc Zao-Zanders gives us this, A 2×2 Matrix to Help You to Prioritise the Skills to Learn Right Now, here: https://hbr.org/2017/09/a-2×2-matrix-to-help-you-prioritize-the-skills-to-learn-right-now This 2×2 matrix puts the 100 tips on a grid/graph to illustrate four quadrants:

• Decide whether you need to learn it
• Learn it as the chance arises
• Schedule a block of time for learning it
• Learn it right away

Marc says this, “You’ll find the quickest wins in the bottom-right quadrant, which we’ve labeled “Learn it right away.” In here we have time-saving shortcuts that can be applied frequently, like Ctrl-Y (redo) and F2 (edit cell) and a nice combination formula that cleanses your spreadsheet of errors (IF(ISERROR)).” Of course, IF(ISERROR) is way out of date and should be replced by IFERROR()

Duncan Williamson

22nd December 2018