Challenge type: What Comes Next? · Difficulty: ★★☆☆☆ Easy
Pixel has lined up some things in a very tidy pattern. Pixel loves tidy patterns! But the last one is missing.
The pattern in words: blue triangle, green triangle, red triangle, blue triangle, green triangle, red triangle, blue triangle, and then… what?
Your choices
- A: green triangle
- B: red triangle
- C: yellow square
- D: blue star
Need a hint?
Count how many things there are before the pattern starts again. Point at each one and say it out loud!
Did you know? When coders spot a pattern, they can write a loop: a few lines of code that repeat the rule as many times as they like. The answer page shows this pattern as real Python code!
For teachers and grown-ups
Skills practised: Pattern recognition, abstraction, and predicting the next step of a rule.
The big idea: Spotting a pattern lets a programmer replace lots of repeated steps with one short loop.
Questions to ask:
- What is the rule, in your own words?
- How many items repeat before the pattern starts again?
- What would the 20th item be? How could you work it out without drawing them all?
Take it further: Children invent their own pattern with a hidden rule and challenge a partner to find it.