The same grandmaster from An overconfident grandmaster decides to avenge his loss and prepares for rematch. He ends up in a winning position once again. He decided to place a bet again. He gives the player two consecutive moves, if he wins the game, he wins the bet, loses if he does not. Unlike t...

So my mom- a teacher - called me and my brother and gave us each a paper and pencil. She said: Think of three distinct single digit positive integers (0 to 9) and write down as many numbers (number combinations) you can make with those three without adding any math operations (like ^ for example)...

I'd like to estimate $7^{100}$ without using these new-fangled computers everyone is talking about, but I think I need your help. Please estimate $7^{100}$ without the use of a computer. My friend Steven told me the value is approximately but he refused to show his work, so I'm inclined not to t...

Just a small visual task. Find the ratio of green to red circles, for planes, tiled with the following patterns:

Four knights were on four hills, some on higher hills than others. The first spoke, and he said: “I begin with my “for” noun, then the one next to me is tumblin’ down, then I… um… ummmm… yeah that’s all I remember.” He had a sign with the hashtag “#MeToo” on it. … The second one spoke, “My start ...

Which country fills in the yellow cell? A cell becomes empty when no country meets the criterion that the country in a non-empty cell meets.

Instructions: Solve the enigmatic crossword Each answer clues a letter Take only the 9 letters which were clued more than once (to find 9 distinct letters) Apply the title and anagram the result for the final relevant answer (single word) Across 1 A cry such as "No!", "Oh!", or "Yikes!" 10 ...