Challenge No. 394: A palindrome number is that which is same even where read backwards.
Solved using: Python in Excel.
Encrypt with Autokey Cipher
Challenge No. 393: AUTOKEY CIPHER – Key is written beneath Plaintext and if key is shorter than Plaintext, then remaining slots beneath Plaintext are filled by letters from Plaintext starting from beginning.
Solved using: R.
Transpose Problem Table Format
Challenge No. 158: Transpose the Problem table into Result table.
Solved using: R.
Reorder Letters by Position Type
Challenge No. 392: Reading from backwards, collect all letters occurring at even positions followed by all letters occurring at odd positions.
Solved using: Python in Excel.
Form Shortest Palindromic Prefix
Challenge No. 391: Find the smallest Palindromes (in length) which can be formed by adding English alphabets before string.
Solved using: Python in Excel.
Log Changes Within Group
Challenge No. 157: Except the Group column, for every other column, log the value within a group if value changes.
Solved using: R.
Digits With Sum Equal to Length
Challenge No. 390: Find the min, max and count of n digit numbers where n = sum of digits
Ex.
Solved using: Python in Excel.
Generate Axis for Four Quadrants
Challenge No. 389: Generate X and Y axes of all 4 quadrants for value given in A1.
Solved using: R.
Assign Teachers to Students
Challenge No. 156: Last Sunday’s challenge was deemed to be super-difficult.
Solved using: Python.
Kamasutra Cipher with Digits
Challenge No. 388: Kamasutra Cipher 2 – Generate 13 random pairs from English alphabets and 5 random pairs from 0-9 digits and use that to encrypt the plain text.
Solved using: R.