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
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.