Problem 4 · 2017 Math Kangaroo
Easy
Spatial & Visual Reasoning
spatial-reasoningsequence-of-figures
This picture shows a bracelet with pearls. Which of the bands below shows the same bracelet as above? (The five bands are shown as choices A, B, C, D, E.)
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Answer: E
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Hint 1 of 2
The bracelet is a ring, so it does not matter which pearl you start counting from.
Still stuck? Show hint 2 →
Hint 2 of 2
Say the colours out loud going around the ring, then find the band that matches when it is wrapped into the same ring.
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Approach: read the pearls around the ring
- The bracelet is a closed ring of pearls. Say their colours out loud going around it.
- When you cut a ring open into a straight band, you can start at any pearl, so the band can begin in a different place but the order of colours stays the same.
- Check each band: does it have the same colours in the same going-around order?
- Band E matches the bracelet.
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