6174 Kaprekar’s constant
This is the spreadsheet to prove this constant. When all roads lead to Kaprekar Just enter any 4 digits number in D3 and watch roads walk you 6174
DayName
Simplest way to get name of day as cell output from a date. Because you can custom format a cell with date to show only that day name This is …
Zipcode-State search
Enter a zip code, and Excel will tell you in which state it is It also has a list of all zip codes for all states and a technique (INDEX …