Recent content by mathal

  1. M

    Can Mathematical Sharpness Puzzles Challenge Your Problem-Solving Skills?

    One further note on puzzle 22 in the book. In my English translation the puzzle starts with a simpler problem. The 3 points on the triangle are 1 2 and 3 and the sum to be arrived at is given as 17. By extension the opposite extreme is 7,8 and 9 on the 3 points and the sum is easily seen to be...
  2. M

    Can Mathematical Sharpness Puzzles Challenge Your Problem-Solving Skills?

    The display of the numbers this way just makes it easier to see all the possible A+B+C=15 at once. These are the 8 cases for A,B,C that mfb referred to outside his spoiler text. Neither mfb nor I have contended that all 8 cases have solutions to the puzzle. mathal
  3. M

    Can Mathematical Sharpness Puzzles Challenge Your Problem-Solving Skills?

    I have an English translation of the book in my library. The English title is The Moscow Puzzles by Boris A. Kordemsky. It was published in 1972 by Charles Scribner's Sons ,translated by Albert Parry, Professor Emeritus of Russian Civilization and Langauge at Colgate College. The book was...
  4. M

    Can Mathematical Sharpness Puzzles Challenge Your Problem-Solving Skills?

    I agree with mfb's number of solutions. Since you mentioned the A+B+C=15 the 'magic square' makes a good visual tool. 8 1 6 3 5 7 4 9 2 Each vertical,horizontal and diagonal line adds to 15 and the remaining numbers are easy to keep track of. mathal
  5. M

    Moviegoers' Club: Largest Number of Common Favorite Movies

    I'm not sure why this wasn't solved sooner. mathal
  6. M

    Can someone explain the neuroscience conjoined twins?

    To Evo, just a quick note, I watched the clip again and just at the end the mother makes a reference the the test where the eyes of one child were kept closed and EEGs registered response to the flash of light in the other girls open eyes. This response is indicative of a neural connectivity...
  7. M

    Can someone explain the neuroscience conjoined twins?

    The two girls are in a sense separate entities in that their bodies are separate -BUT both girls perceive both bodies, hence they are one 'whole' in a perceptual sense with two minds. The real separation is in the aspects of the brains of each girl that are unique. Each has already begun to...
  8. M

    How to Beat a Speeding Ticket for Motorists

    No clue. Here are my thoughts on the words. green -environmentally friendly weenie -hot dog - stretch to - any sausage - German - VW or other - further stretch -Polish Ukrainian etc.
  9. M

    What Am I If Not Mozzarella, Swiss, or Monterey Jack?

    Although Jimmy's answer is appropriate, another answer come to my mind.
  10. M

    How Does the Three Word Story Game Work?

    Sacre trou bleu!
  11. M

    What is the solution to this simple sum problem?

    I'm going to leave this last message for clarification. CompuChip submitted a message in which he explained the math series in the newspaper that inspired this puzzle. His open comments indicate he felt he was submitting an answer to the puzzle. He was mistaken. The answer is in my last post. If...
  12. M

    What is the solution to this simple sum problem?

    This post contains the answer inside the spoiler. For a DOH! moment read it. I'd stick with the AHA moment, but to each his/her own. mathal
  13. M

    What is the solution to this simple sum problem?

    This is a reply to the last post. Ignore it if you want to solve this without any help. mathal
  14. M

    What is the solution to this simple sum problem?

    (1/1-1/6) + (1/2-1/7) + (1/3-1/8)...+(1/95-1/100) This was on the cover of a local paper with the caption "You can't solve this but he can!" The 'he' in the caption was a 12 year old boy. On the next page they gave as his solution 2.2. Two things are clear, 1.-the boy had the right answer and...
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