Before I was brought to life, I was able to choose my gender and my living environment. I own a large piece of land for anything I like in front of my house. I make friends with local people, by talking and sending gifts. I improve the quality of life by donating goods to little spirits in an aba...

Given a test with yes/no questions, a candidate is able to submit multiple solutions. For a given solution, the candidate gets feedback on the correct number of answers. The goal is to recover the answers to all the questions. What strategy a candidate use to minimize: The worst-case number of s...

Grandpa e mailed me a puzzle. Seemed very straightforward to me until I read it again. "Are you sure this is right?" My e mail "If there is a mistake- and I'm not saying there is- then it might lead you to the answer!" This is what he sent me. 21 begins with a T 311 begins with a T 511 begins wi...

Intended for Fortnightly Topic Challenge #47: Wacky Sudokus, but I was too slow making it... not for lack of trying, I assure you This puzzle is both* a Pentominous and a Sudoku**. Rules Solve the 9x9 grid as a Sudoku, with standard rules, treating the digits as givens and ignoring the letters. ...