Recent Comments
Senthil Kumar VS on Solution to Puzzle #200: Achie… Alok Goyal on Puzzle #200: Achieve your… Vishal Poddar on Puzzle #200: Achieve your… Alok Goyal on Puzzle #200: Achieve your… Abdul on Puzzle #200: Achieve your…
Monthly Archives: July 2016
Puzzle #148: The First Black Ace
Yet another wonderful puzzle from Martin Gardner’s book “The Colossal Book of Short Problems and Puzzles”. This one is a probability puzzle, and something you should try with your children. A deck of 52 playing cards is shuffled and placed facedown … Continue reading
Solution to Puzzle #146: The Proud Party Goers
Apologies for not being able to post last weekend, ended up in parenting duties more than I bargained for! This was not a very difficult puzzle, but I did not get as many solutions. Congratulations to Suman Saraf, Gautam Kumar … Continue reading
Puzzle #147: The “Aha” IBM Puzzle!
Sometimes I worry whether I will continue to get good puzzles for children, but every such time one comes across some beautiful puzzle! I came across one such yesterday in Martin Gardner’s book “The Colossal Book of Short Problems and … Continue reading
Solution to Puzzle #145: The WHO Puzzle
This was perhaps not an easy problem for children, but I got correct responses from Suman Saraf, Abhinav Jain and Pratik Poddar. The correct answer is ~0.01%, that is the probability of you having the disease is very low, even … Continue reading
Puzzle #146: The Proud Party Goers
This is a very nice puzzle I got from a site (fivethirtyeight.com) recommended to me by Suman Saraf – thanks Suman. It’s Friday and that means it’s party time! A group of N people are in attendance at your shindig, … Continue reading
Solution to Puzzle #144: Pirates and Gold Once Again
Many correct responses to this puzzle, but the I was happiest to see was Danny from Washington DC, an 8th grader – well done Danny. Other people who sent the right answer included Suman Saraf, Vivek Rai and Pratik Poddar. … Continue reading
Puzzle #145: The WHO Puzzle
This is another puzzle from the Ramanujan collection, a nice probability puzzle! The World Health Organization has just identified a new disease. The good news is that it is very rare: only 1 in every million people has it. The … Continue reading
Solution to Puzzle #143: Magic 8
Apologies for a long period of silence, I was traveling on work and then on vacation outside India and in the process just did not have the time to respond to messages and also add any posts. Normal service resumes … Continue reading
Alok Goyal's Puzzles Page 