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Why does this toy always bounce back no matter how hard it's punched?
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The segments dividing this triangle are parallel to the triangle's base.
Which colored area is the largest?
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What is the radius of this quarter-circle?
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A small ball is placed on top of a bigger, heavier ball at a height of 10 m above the ground.
When the balls are simultaneously released and bounce, how high will the smaller ball bounce up to?
Assumptions:
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Which of the following figures has the greatest area shaded in red?
Assumptions:
Note: If you get it wrong, don't worry! An Italian mathematician named Malfatti also got it wrong in the 19th century.
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