Puzzles with Eder: How can this area be calculated?:
How big is the area of the yellow triangle?
spektrum.de/raetsel/wie-laesst-sich-diese-flaeche-berechnen/2087277
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What is the red area of the logo?: How can the size of the red area be calculated?
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What numerical values for the hexagon are sought?: Is there a regular hexagon that satisfies this condition?
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What is the area?: How can the area of the triangle be calculated if the lengths of the three sides are known?
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How many coins were in the piggy banks at the beginning?: How many 1-euro coins were in the piggy banks before the redistribution?
spektrum.de/raetsel/wie-viele-muenzen-befanden-sich-zu-beginn-in-den-spardosen/2243698
How can the side lengths of the squares be determined?: What are the side lengths of the squares under these conditions?
spektrum.de/raetsel/wie-lassen-sich-die-seitenlaengen-der-quadrate-ermitteln/2243715
What is the area of the trapezoid?: How can the area of the trapezoid be determined?
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Is this assumption correct?: Is Marie right with her assumption?
spektrum.de/raetsel/trifft-diese-vermutung-zu/2243760
What number does n represent?: What number is represented by the natural number n?
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What height was the cone with its tip?: How high was the cone before it lost its tip?
spektrum.de/raetsel/welche-hoehe-hatte-der-kegel-mit-seiner-spitze/2084820
Which number represents the question mark?: Which number belongs in this number staircase?
spektrum.de/raetsel/welche-zahl-steht-fuer-das-fragezeichen/2084991
What numbers are hidden behind the two question marks?: What numbers do the two question marks in the pentagon represent?
spektrum.de/raetsel/welche-zahlen-verbergen-sich-hinter-den-beiden-fragezeichen/2085006
How big is the pond?: How big will the new pond be?
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Puzzles with Eder: What are the side lengths of the cube?: Dice numbers - | what is the natural number a?
spektrum.de/raetsel/welche-seitenlaenge-hat-der-wuerfel/2085072
Puzzles with Eder: Which numbers solve this problem?: Hidden addition – can you figure out these numbers?
spektrum.de/raetsel/welche-zahlen-loesen-diese-aufgabe/2085171
Puzzles with Eder: What is the area of the square?: The enlarged square - | how big is its area?
spektrum.de/raetsel/welche-flaeche-hat-das-viereck/2087394
Puzzle with Eder: What special thing do these numbers have in common?: What distinguishes these 15 three-digit natural numbers?
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Puzzle with Eder: What is the area of this triangle?: How can the area of the blue triangle be calculated?
spektrum.de/raetsel/welche-flaeche-hat-dieses-dreieck/2261848
Puzzle with Eder: Which number is hidden behind the question mark?: Which number is missing from this table of numbers?
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