Geometry problems

A few weeks ago I mentioned Catriona Shearer and her twitter account with geometry puzzles.

She has collected all her geometry puzzles of the last few months in some powerpoint sheets, which you can find here.

numbers 2, 3 and 5

A couple of years ago I posted the problem of four fours.

Recently I stumbled upon Gene Wirchenko’s Blog, and he had s similar problem.

Here is a variation of his problem. Combine 2, 3 and 5 to make all the numbers 0-22. Use each of the three digit exactly once, but you are free to use addition, multiplication, division, subtraction, brackets, exponentiation and factorial as often as you like.
For those of you who are not familiar with factorials a short reminder:
0! = 1
1! = 1
2! = 2*1
3! = 3*2*1
4! = 4*3*2*1
etc.

You can check your solution here

New puzzles are published at least twice a month on Fridays. Solutions are added after several weeks.

Plastic snake (2)

On June 8, I published a couple of figures which can be made with the plastic snake puzzle of Clown Games, and 5 years ago I wrote about another one.

My wife Jos and our daughter Margreet made a cpouple of new figures, which are too goof not to share with you, especially as some of the recent ones are real gems.

4 squares

This puzzle was inspired by a puzzle in one of the many Mensa puzzle books, “”Logic brainteasers”, by Philip Carver and Ken Russell.

You can check your solution here