Competition #4

The usual rules apply for this competition. See the previous competition for the rules.

Don’t post any answers here. Email your answers to Alan one question at a time.

Q1. Without taking your pen off the paper, draw four straight  lines going through all the nine dots below:

 

Dots4LinesA

 

Q2. A farmer has 10 trees that he wants to plant in five straight rows with four trees in each row. How can he do this?

 

Q3. I have six matchsticks. How can I make 4 triangles?

 

Q4. I have six matchsticks. How can I arrange them so that every matchstick touches every other matchstick?

Good luck.

 

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