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Tag Archives: Numbers puzzles
Solution to Puzzle #183: 8 Digits
This was a relatively simple problem. I was happy to see my 10 year old, Arushi, solve this one. I also got correct answers from Karan Sharma, Mahi Saraf, Anahat Prakash, Pooja Goyal, Pratik Poddar and Suman Saraf. Well done … Continue reading
Puzzle #183: 8 Digits
This is another 2minute problem that kids will enjoy. Found this one again in Martin Gardner’s The Colossal Book of Short Puzzles and Problems. Look at the figure below, which has 8 empty circles. You need to place digits 1 … Continue reading
Puzzle #177: How Many Times You Can Measure
This is a variation of Puzzle #14 (https://alokgoyal1971.com/2013/04/28/puzzle14measuringtime/) that I found on the site fivethirtyeight.com. A fantastic puzzle! Suppose you have four ropes and a lighter. Each rope burns at a nonconstant rate but takes exactly one hour to burn … Continue reading
Solution to Puzzle #172: Divisibility by First 13 Numbers
This was perhaps too simple a problem, to the point that very few responded ðŸ˜¦ Thanks to Abhinav Jain and Pratik Poddar for sending in the correct answers. The answer is 360,360. We are already told that the answer for … Continue reading
Puzzle #171: Buying Dimsums
This is a beauty of a puzzle sent by Suman Saraf – thanks Suman! A fast food restaurant sells dimsums in boxes of 7 and 3. What’s the greatest number of dimsums a person cannot buy. Generalize it for p … Continue reading
Solution to Puzzle #166: Donut Sharing
This was a very simple puzzle, perhaps a bit too simple and I therefore received only two correct responses – Pratik Poddar and Mahi Saraf – well done both! I am taking the liberty of reproducing the answer from Mahi: … Continue reading
Puzzle #167: 4 Rats in a Star
Yet another wonderful puzzle from the NSA collection. Please do have your children try this one! RATS x 4 = STAR Each instance of a letter stands for the same digit, no two letters represent the same digit, and R … Continue reading