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  2. Ghana National Science and Maths Quiz - Wikipedia

    en.wikipedia.org/wiki/Ghana_National_Science_and...

    Each contesting school has to answer 4 Biology, 4 Chemistry, 4 Physics and 4 Mathematics questions. A wrongly answered question may be carried over as a bonus. Partial credit is sometimes awarded by the quiz mistress. Round 2 — This round is called the speed race. All three schools are presented with the same mainly applied questions at the ...

  3. 30 Math Puzzles (with Answers) to Test Your Smarts - AOL

    www.aol.com/30-math-puzzles-answers-test...

    These math puzzles with answers are a delightful challenge. The post 30 Math Puzzles (with Answers) to Test Your Smarts appeared first on Reader's Digest. ... And, if you prefer your riddles free ...

  4. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    Flow of dollars in the riddle – comparing the sum of values circled in yellow (10+10+10=30) with the sum of absolute values of those shaded yellow (9+9+9+2=29) is meaningless. The missing dollar riddle is a famous riddle that involves an informal fallacy. It dates to at least the 1930s, although similar puzzles are much older. [1]

  5. Nine dots puzzle - Wikipedia

    en.wikipedia.org/wiki/Nine_dots_puzzle

    The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen. The nine dots puzzle is a mathematical puzzle whose task is to connect nine squarely arranged points with a pen by four (or fewer) straight lines without lifting the pen or retracing any lines.

  6. 37 of the Best Riddles for Teens (with Answers) - AOL

    www.aol.com/37-best-riddles-teens-answers...

    Have a fun family game night with these brain twisters! The post 37 of the Best Riddles for Teens (with Answers) appeared first on Reader's Digest.

  7. 78 Riddles for Adults That Will Test Your Smarts - AOL

    www.aol.com/lifestyle/78-riddles-adults-test...

    The post 78 Riddles for Adults That Will Test Your Smarts appeared first on Reader's Digest. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290 ...

  8. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

  9. Ant on a rubber rope - Wikipedia

    en.wikipedia.org/wiki/Ant_on_a_rubber_rope

    An ant starts to crawl along a taut rubber rope 1 km long at a speed of 1 cm per second (relative to the rubber it is crawling on). At the same time, the rope starts to stretch uniformly at a constant rate of 1 km per second, so that after 1 second it is 2 km long, after 2 seconds it is 3 km long, etc.