Problem 3 · 2018 Math Kangaroo
Easy
Spatial & Visual Reasoning
spatial-reasoning
The diagram shows a wooden block with 5 screws. Four of them are equally long; one screw is shorter. Which is the shorter screw?
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Answer: E — 5
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Hint 1 of 2
The block sits flat, so the screws all start from the same wood; the long ones poke out the bottom the same amount.
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Hint 2 of 2
Look for the one screw whose point does not reach as far as the other four.
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Approach: compare how far each screw reaches against the four matching ones
- Four of the screws are the same length, so their tips all reach down to the same level.
- One screw's tip stops higher up than the rest — that is the short one.
- It is screw number 5, answer E.
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