Category Archives: Riddles

The Mirror Paradox

Posted on February 20, 2019 by davidbdale

In-Class Task In a brief comment in the Reply field below, describe our common misconception about mirrors and why it’s so hard to talk ourselves out of the illusion that they flip images.

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Card Hypothesis

Posted on February 4, 2019 by davidbdale

FACT: Each card has a number on one side and a letter on the other.HYPOTHESIS: Every card that has a vowel on one side has an even number on its opposite side.THE TEST: Which card or cards must you turn … Continue reading →

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Africans and Americans

Posted on January 25, 2019 by davidbdale

Riddle: Find the African-American

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