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    Mighty Mini Mind Bogglers
    Mighty Mini Mind Bogglers
    Mighty Mini Mind Bogglers
    Ebook129 pages1 hour

    Mighty Mini Mind Bogglers

    By Karen C. Richards

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    About this ebook

    Great for classrooms and free-time fun, these small but substantial challenges offer lighthearted, nonacademic approaches to a variety of math, logic, and verbal conundrums. Most of the puzzles can be completed in only a few minutes and are a perfect way to get children interested in mathematics — adults will relish them as well.
    LanguageEnglish
    PublisherDover Publications
    Release dateSep 5, 2013
    ISBN9780486320403
    Mighty Mini Mind Bogglers

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      Book preview

      Mighty Mini Mind Bogglers - Karen C. Richards

      Richards

      Puzzles

      .............

      Mind Boggier

      Here’s a quick brainteaser: What is special about the grid below—and what is missing from it?

      Answer, page 141

      Tying the Knot

      According to an ancient custom, if a woman throws five ropes out of a high window, and three or more of them land such that they will form knots when both ends are pulled, she will be married within the next year.

      The ropes here show one woman’s tosses. Should she expect a wedding this year?

      Answer, page 153

      Technique-Color

      Jo is making a stained-glass window, and she wants each adjacent piece of glass to be a different color. She wants to use just four colors: yellow, orange, purple, and red.

      If the center circle is yellow, and two other pieces are colored as shown, what color does piece A need to be?

      Answer, page 151

      Animal Strength

      If the first two tug of war contests shown here are ties, which group will win the third contest, or will it also be a draw?

      Answer, page 128

      Theory of Relativity

      At the Embee family reunion, your sister is talking to your grandmother Mary, your cousin Bo, and your uncle Bill. Who are you?

      Answer, page 152

      Paper Clip Flip

      Most of the wire sculptures below were made from standard paper clips, by twisting them at existing bends.

      Which of the shapes could not have been made by bending the original paper clip?

      Answer, page 144

      12-Step Program

      Work through the code of this computer program, line by line. Your output will answer this riddle: WHAT DID COWBOY DAVE HAVE TO DO BEFORE GOING TO THE COMPUTER-USERS’ DANCE?

      01 Set Number = 1

      02 Set Letter at (Number) = P

      03 Number = Number + 3

      04 Set Letter at (Number) = O

      05 Number = Number + 1

      06 If Number ≤5 go to line 04

      07 Set Letter at (Number) = B

      08 Number = Number ÷ 3

      09 Set Letter at (Number) = U

      10 Number = Number + 1

      11 Set Letter at (Number) = T

      12 Reverse the output

      Output:

      Answer, page 153

      Thirteen Candles

      Claude doesn’t want anyone to know how old he is unless they do some work. So he designed a birthday cake that uses 13 candles and represents his age.

      If you count all of the triangles of all sizes formed by the lines connecting the candles, you will discover Claude’s age. Can you figure it out before the candles are blown out?

      Answer, page 152

      Hairy Tales

      1. Rapunzel’s hair grew 100 feet longer while waiting to be saved by the prince. Hair grows one inch every two months. So, how long had the fair maiden been trapped in the tower when she was rescued?

      2. In Washington Irving’s story, Rip Van Winkle’s beard grew two feet in the 20 years that he slept. Is the story accurate?

      Answer, page 138

      Keep the Faith

      The eruptions of the Old Faithful

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