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Category Archives: Puzzles
Puzzle #18: Who will win the game?
Here is a two player game – there are three piles of stones: one with 10 stones, one with 15 stones, and one with 20 stones. At each turn, a player can choose one of the piles and divide it … Continue reading
Puzzle #17: Perfect Square with 0’s, 1’s and 2’s
Since the previous puzzle was very tough, a relatively simpler problem. Can a number be written with one hundred 0’s, one hundred 1’s and one hundred 2’s be a perfect square. If yes, what is that number, if not, prove … Continue reading
Puzzle #16: Crossing the Desert, a Classic Puzzle!
This is one of my favorites – I read this puzzle for the first time in 1992 on rec.puzzles (for those of you who remember these newsgroups!), and honestly have struggled with this ever since. I saw this puzzle again … Continue reading
Puzzle #15: The Early Commuter
A commuter is in the habit of arriving at his suburban station each evening at exactly five o’clock. His wife always meets the train and drives him home. One day he takes an earlier train and arrives at his station … Continue reading
Puzzle #14: Measuring Time
In this “episode”, there are two different puzzles, both of them are measuring a specific duration of time with a few “timers”. Here is the first one: You have two lengths of fuse, each will burn for exactly one hour. … Continue reading
Solution to Puzzle #13: Mutilated Chessboard and Dominoes
I got two correct answers to this puzzle, though I believe many people have done this puzzle in the past. The correct ones were from Tishyaa Chaudhry and Anisha Sharma Goyal – congratulations to both! The trick to the puzzle … Continue reading
Puzzle #13: Mutilated Chessboard and Dominoes
This is a famous puzzle that I have come across in many different puzzle books. I have taken this from one of Martin Gardner’s books – The Best Mathematical and Logic Puzzles (Puzzle #3). The props for this puzzle are … Continue reading
Solution to Puzzle #12: How many routes?
I got only two correct answers for this puzzle – one of which is from Tishyaa Chaudhry, who is one of the most amazing puzzlers amongst kids I have come across. Well done Tishyaa. There are two good solutions to … Continue reading
Puzzle #12: How Many Routes?
This is a puzzle from the book “Moscow Puzzles”, and the book borrowed this puzzle from one of the Mathematical Circles, a unique Russian way of making learning of Mathematics more fun through puzzles. Here is the puzzle: How many … Continue reading
Solution to Puzzle #11: The 10-digit number
I got the most number of correct answers for this puzzle. I was particularly impressed by Ameya Kulkarni (from London), Salil Kuchlous (from Bangalore) and Tishya Chaudhry and Anisha Sharma Goyal (both Gurgaon) – all kids who solved the puzzle. … Continue reading
Alok Goyal's Puzzles Page 