Remember: A loop can sit inside another loop. The inside loop runs fully each round.
Questions
1
Which program lays 15 stones?
🟨a loop of 4 around a loop of 4🟩a loop of 3 around a loop of 5🟫a loop of 3 around a loop of 3
2
Which program lays 20 stones?
🟨a loop of 4 around a loop of 4🟪a loop of 4 around a loop of 5⬜a loop of 2 around a loop of 5
3
Which program lays 9 stones?
🟩a loop of 3 around a loop of 5🟫a loop of 3 around a loop of 3🧱a loop of 2 around a loop of 4
4
Which program lays 12 stones?
🟦a loop of 3 around a loop of 4🟩a loop of 3 around a loop of 5🟨a loop of 4 around a loop of 4
5
Which program lays 6 stones?
🧱a loop of 2 around a loop of 4🪨a loop of 2 around a loop of 3🟦a loop of 3 around a loop of 4
6
🟨Does a loop of 4 around a loop of 4 lay 10 stones?
YesNo
7
Outside 3, inside 4. Which step runs 12 times?
⏮️a step before both loops🔁a step inside the inside loop⏭️a step after the inside loop
8
🧱Does a loop of 2 around a loop of 4 lay 10 stones?
YesNo
9
⬜Does a loop of 2 around a loop of 5 lay 10 stones?
YesNo
10
Outside 3, inside 4. Which step runs once?
⏭️a step after the inside loop⏮️a step before both loops🔁a step inside the inside loop
11
🟦Does a loop of 3 around a loop of 4 lay 12 stones?
YesNo
12
🟫Does a loop of 3 around a loop of 3 lay 12 stones?
YesNo
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Answer key · Set C
Loops inside loops
1a loop of 3 around a loop of 5
2a loop of 4 around a loop of 5
3a loop of 3 around a loop of 3
4a loop of 3 around a loop of 4
5a loop of 2 around a loop of 3
6No
7a step inside the inside loop
8No
9Yes
10a step before both loops
11Yes
12No
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