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Tag Archives: Numbers puzzles
Puzzle #117: Mr. Calendar
This is a beautiful brain teaser that my wife, Pooja, asked me a few days back just before we were going to sleep – yes this was our pillow talk 🙂 Mr. Calendar spends a sum equal to the date … Continue reading
Puzzle #116: The Magic Card Frame
Yet another wonderful numbers puzzle from Alok Mittal’s Mathematical Circles class. Not too difficult, and yet a lot of fun! Take 10 cards of the same suite from Ace (A) through 10, i.e. essentially numbers 1-10. Using each card exactly … Continue reading
Solution to Puzzle #114: 1978
This was a relatively simple puzzle and the number of people who sent correct answers was overwhelming. I will try to capture as many as I can – Ishir Gupta (only one not to use algebra), Pratik Poddar, Suman Saraf, … Continue reading
Puzzle #114: 1978
This is a puzzle for the number buffs that I found on http://www.mindcipher.com The year 1978 is such that the sum of the first two digits and the latter two digits is equal to the middle two digits, i.e. 19 … Continue reading
Solution to Puzzle #108: The Double Square Number Problem
Apologies that I could not post the answer last weekend as I was traveling. I was overwhelmed by the number of answers i received for this puzzle – most of them correct. However, many people used spreadsheets or a small … Continue reading
Solution to Puzzle #102: The Persistence Problem
This was a difficult puzzle, though I continue to be amazed how so many people solve them with such speed…my hats off to all the ones who solved this one. That includes Saurabh Aggarwal, Abhinav Jain, Akshay Joshi, Suman Saraf … Continue reading
Puzzle #102: The Persistence Puzzle
This is yet another famous puzzle from the Martin Gardner collection. I was made aware of this one by my nephew, Karan Sharma – thank you! I have not looked up the answer to this one, so do not know … Continue reading
Solution to Puzzle #96: Daughter’s Ages
This was a relatively simple puzzle, and I received many correct answers – Santosh Kumar, Kamaljit Dhooria, Karan Sharma, Anisha Goyal, Mohit Khare, Abhinav Jain, Vijay Raghavan, Pratik Poddar, P R Kumar and Suman Saraf + his 10 year old daughter! … Continue reading
Puzzle #96: Daughter’s Ages
This is a wonderful puzzle contributed by Pallav Pandey – thank you Pallav. This is a nice puzzle that does not require use of any specific concept, and should be fun for children as well. 2 maths prof who used … Continue reading
Answer to Puzzle #88: Ken Ken Puzzles
I got only a few answers to this puzzle, and all of them correct. In my opinion, the difficult one was pretty difficult – thanks to those who attempted it, and more so to those who sent a correct answer. … Continue reading
Alok Goyal's Puzzles Page 