Challenges categorized by topic.
Challenge No. 142: The Question table contains information about the fingerprinting times for various personnel when entering the company.
Solved using:Excel (DROP, HSTACK, IF), Google Sheets, Power Query (Table.AddColumn, Table.Group, Table.Pivot), Python, Python in Excel, and R.
Challenge No. 141: For each blank cell, replace the null value with the value from the row above that has the same ID.
Solved using:Excel (FILTER, HSTACK, IF), Google Sheets, Power Query (Table.Group), Python, Python in Excel, and R.
Challenge No. 215: This problem is contributed by Mehmet Çiçek.
Solved using: Python in Excel.
Challenge No. 140: For each customer, extract the ten consecutive days with the highest purchases.
Solved using:Excel (FILTER, HSTACK, IFS), Google Sheets, Power Query (Table.AddColumn, Table.Group), Python in Excel, and R.
Challenge No. 212: (Baconian Cipher – This problem is case sensitive)
A/a is 0, B/b is 1, C/c is 2.
Solved using: Power Query.
Challenge No. 139: The stock prices for the given dates are provided in the table.
Solved using:Excel (VSTACK), Google Sheets, Power Query (Table.Group, List.Combine, List.Transform), Python, and Python in Excel.
Challenge No. 138: Based on the “transactions” table, summarize the sales for each month by breaking them into three periods:
P1: First 10 days of the month
P2: From the 11th to the 20th
P3: From the 21st onward.
Solved using:Excel (DAY, DROP, HSTACK), Google Sheets, Power Query (Date.Month, List.Distinct, Table.AddColumn), Python, Python in Excel, and R.
Challenge No. 207: DATE CIPHER
Date cipher is a type of Caesar’s shift cipher where key is current date in YYYYMMDD format.
Solved using: Excel VBA.
Challenge No. 203: Baconian Cipher
(This problem is case insensitive)
A is 0, B is 1, C is 2.
Solved using: Power Query.
Challenge No. 136: Split the ID values where a character is repeated consecutively.
Solved using:Excel (CONCAT, DROP, IF), Google Sheets, Power Query (List.Transform, Text.Combine, Table.AddColumn), Python, Python in Excel, and R.
