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A whale and a chihuahua dog are in free fall while skydiving on the moon (there is no air resistance).
Which animal has a greater acceleration?
Note: Don't worry about the whale and the chihuahua, they're skydiving with MoonJumps Inc. which supplies them with rocket packs for a safe landing.
by
Danielle Scarano
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In the figure below, the skier crouches in an 'egg position.'
Which of the following options best describes her effort to crouch like that?
by
Shreyansh Mukhopadhyay
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Each turquoise rectangle has dimensions of a×b.
What is (a+b)2−(a−b)2?
by
Andrew Hayes
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How many times in a day (00:00-24:00) do the minute and hour hands of an analog clock form a 180∘ angle, i.e. form a long, straight line?
by
Chandrashekar Giridharan
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In Germany, the problem to the right is known as "Das Haus vom Nikolaus." The left diagram is a "house" that can be drawn with a single stroke of a pen (never drawing the same segment twice). A possible solution is on its right.
Which of the diagrams below can be drawn with a single stroke of a pen?
by
Markus Michelmann
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