Problem 7 · 2017 Math Kangaroo
Easy
Spatial & Visual Reasoning
spatial-reasoning
The following picture shows a necklace with six pearls. Which of the following diagrams shows the same necklace?
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Answer: A
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Hint 1 of 2
A necklace can be turned around or flipped over, so look at the order of the colours, not the starting point.
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Hint 2 of 2
Read the beads in order around the loop and find the choice with the same repeating pattern.
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Approach: match the cyclic colour order, allowing rotations and a flip
- On a closed necklace you may start counting at any bead and go either way.
- Read the colour sequence of the original loop.
- Check each choice for the same sequence up to turning or flipping.
- Only choice A gives the same bead pattern.
Mark:
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