Problem 2 answer key

The Necklace Code

Grade 3 · Patterns and algebra

MJ 3.8 · C3 · W2 Stretch challenge · Moderate workload

About 4–11 minutes

3 jewels

The Necklace Code — answer

Problem ID: 2

Four complete pattern groups use 16 jewels. The next three jewels are ruby, sapphire, sapphire.

  • Position 19 is a sapphire.
  • The necklace has 5 rubies, 10 sapphires, and 4 emeralds.

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