**1) 3-1=8?**^{***/*****}

Please correct the following equation by moving two matchsticks:

You can check your solution here

New puzzles are published at least twice a month on Fridays.

**1) 3-1=8?**^{***/*****}

Please correct the following equation by moving two matchsticks:

You can check your solution here

New puzzles are published at least twice a month on Fridays.

Have a look at at this diamond – it is made up of 10 triangles.

Your challenges are:

**1) 8 triangles**^{**/*****}

Move 4 matchsticks and have 8 triangles

**2) 7 triangles**^{**/*****}

Move 4 matchsticks and have 7 triangles

**3) 6 triangles**^{**/*****}

Move 4 matchsticks and have 6 triangles

**4) 5 triangles**^{**/*****}

Move 4 matchsticks and have 5 triangles

You can check your solution here

New puzzles are published at least twice a month on Fridays.

Our daughter Margreet installed the “100 doors challenge” on her phone, and this weeks puzzles is based on one of the levels.

If 178 gives 237, what does 640 give?

You can check your solution here

New puzzles are published at least twice a month on Fridays.

**1) 3-7=8?**^{***/*****}

Please correct the following equation by moving one matchstick:

**1) 3-7=8?**^{***/*****}

Please correct the following equation by moving exactly two matchsticks:

You can check your solutions here

Originally I had only puzzle nr. 2. I’d like to thank reader Mr. Haubrich for pointing out nr 1.

New puzzles are published at least twice a month on Fridays.

What do you read when you superposition these three figures?

You can check your solution here

New puzzles are published twice a month on Fridays. Solutions are revealed one or more weeks later.

This puzzle was inspired by the “100 doors” app, and by the Dutch translation of 1000 casse-tete et enigmas by Piere Berloquin.

Last month we looked at some hexagon matchstick puzzles, and this month features some more.

**1) Move 4 matches**^{**/*****}

From the figure above, move 4 matchsticks so that you have 4 triangles on unequal size.

**2) Move 4 matches**^{***/*****}

From the figure above, move 4 matchsticks so that you have 6 triangles again.

You can check your solutions here and here.

New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.

Matchsticks puzzles are over a century old, but seem to go through a revival with several apps featuring them.

**1) Move 3 matches**^{**/*****}

From the figure above, move 3 matchsticks so that you have 4 same sized triangles.

**2) Move 4 matches**^{***/*****}

From the figure above, move 4 matchsticks so that you have 4 same sized triangles.

You can check your solutions here and here.

New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.

Have a look at the following figure:

You can easily check that 16 matches form 5 squares.

**Move 2 matches**^{**/*****}

Move 2 matches to create 4 squares

You can check your solution here

**Move 3 matches**^{**/*****}

Move 3 matches to create 4 squares

You can check your solution here

**Move 4 matches**^{**/*****}

Move 4 matches to create 4 squares

You can check your solution here

New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.

**3 triangles**^{***/*****}

Move 2 matchsticks to get 3 triangles:

You can check your solutions here.