"The problem depicted here was contributed by Dunsany to The Week-End
Problems Book, compiled by Hubert Phillips.
White is to play and mate in four moves. The position is one that could
occur in actual play."
Source : I got the above text and the picture from the book, "My best Mathematical and L...
AN ABSENT-MINDED bank teller switched the dollars and cents when he cashed a
check for Mr. Brown, giving him dollars instead of cents, and cents instead of
dollars. After buying a five-cent newspaper, Brown discovered that he had left exactly twice as much as his original check. What was the amo...
Handmade Puzzle!
1. Notation
Covarable - If a figure A can be covered with figure B, without double(or more)-covered areas, allowing rotations and flips, then A is coverable with B.
Non-Coverable - Not coverable.
2. Examples
Chessboards(8x8) are coverable with 2x1-sized dominos. (Maybe this co...
Make the numbers 1-20 using exactly four 4s each time.
You may use the 4s in any way you like and any operations.
Source:
https://www.gleammath.com/post/the-four-fours
What letter should replace the question mark? Explain.
4<•
6<•
9<•
10<•
14<•
15<•
E K Q R...
