pxt-calliope/olddocs/lessons/lucky-7/quiz-answers.md

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# lucky 7 blocks quiz answers
Show a number on the micro:bit.
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This is the answer key for the [lucky 7 quiz](/lessons/lucky-7/quiz).
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## 1. Describe what `show number` does?
Answers may vary. This will show a number on the LED screen, one digit at a time (scrolling from left to right).
## 2. Draw every LED that is ON after running this code
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```blocks
basic.showNumber(7)
```
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![](/static/mb/lessons/lucky-7-0.png)
## 3. Draw every LED that is ON after running this code
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```blocks
basic.showNumber(21)
```
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![](/static/mb/lessons/lucky-7-1.png)
## 4. Write the code that will be used to display the number 3 on the micro:bit.
![](/static/mb/lessons/lucky-7-2.png)
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```blocks
basic.showNumber(3)
```