This week's maths problem

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Problem of the week

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On Friday of each week we will post a new maths challenge.
You may submit your solution by the following Thursday.
Each problem contains two different levels of difficulty. You will be awarded from 2 to 12 points for a full answer.
Each series contains 12 problems before the stage winner is determined.
Your score will be published here.

In each series we will give away 3 books as prices. The prices will be drawn by lot among the best ten participants of the series. The books are kindly sponsored by Buchdienst Rattei of Chemnitz.

Suggestions for problems are welcome.

Deadline is 22.nd May 2025

German version - Italian version - French version - Spanish version  Hungarian Version Russian version  --> 中文/Chinese <-- --> Ελληνικά   <-- Esperanto <-- --> Arabic <--

Series 69

problem 822

‘What did you construct?’ Maria asked her friend Lisa. ‘I started with the green (10 cm x 5 cm) rectangle and then constructed the two blue and two red quarter circles.’
The area of both figures is therefore the same.
What is the area of the figures?- 4 blue points.
How big are the perimeters of both figures - or are they also the same? 4 red points.

Deadline for solution is the 22nd. May 2025.

-> Enigma <--

https://www.schulmodell.eu/images/stories/mathe/horst/raetsel.php

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adress:
Thomas Jahre
Paul-Jäkel-Straße 60
09113 Chemnitz
Germany

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