Challenge No. 269: Remove consecutive digits from the number.
Solved using: Excel VBA.
Custom Grouping! Part 12
Challenge No. 163: Convert the monthly sales data from the Question table into seasonal sales as shown in the Result table.
Solved using:Excel (FILTER, GROUPBY, HSTACK), Google Sheets, Power Query (Table.Group, Table.AddColumn, Table.Group), Python, Python in Excel, and R.
Sales Based on Custom Month Range
Challenge No. 92: The accounting month of this company finishes on last Friday of the month.
Solved using: Python in Excel.
Decrypt Baconian Cipher Text
Challenge No. 268: Find the Decrypted words corresponding to Encrypted words .
Solved using: Excel VBA.
Extract From Text! Part 5
Challenge No. 162: Separate the values inside the curly braces { }, do the same for nested curly braces.
Solved using:Excel (IFNA, LAMBDA, LET), Google Sheets, Power Query (List.Transform, Table.AddColumn), Python, Python in Excel, R, and VBA.
Mark Repeats in Date Column
Challenge No. 91: Transpose the problem table into result table.
Solved using: Power Query (Table.AddColumn, Table.SelectRows).
Check Digit Occurrence Validity
Challenge No. 266: List those numbers only where odd digits appear odd number of times and even digits appear even number of times.
Solved using: Excel VBA.
Find Isogram Calendar Dates
Challenge No. 265: An Isogram date is a two digits year date in which no digit occurs more than once.
Solved using: Power Query.
Custom Grouping! Part 11
Challenge No. 161: Extract the list of dates associated with each product and display them under each other in separate columns.
Solved using:Excel (DROP, FILTER, HSTACK), Google Sheets, Power Query (Table.Group), Python, Python in Excel, and R.
Insert Increasing Header Intervals
Challenge No. 90: Insert header row after 1 name, then after 2 names, then after 3 names and so on.
Solved using: Power Query.