MathterRiddler @MathterRiddler · 5d Puzzle from the Mathter website - Do All Horses Have the Same Color?: mathter.islands.co.il/en/questions/3… #Puzzle #InductionMathematicalInduction #ConstructinganExampleCounterexample #Paradoxes 1 4
MathterRiddler @MathterRiddler · Mar 21 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/15 #Puzzle #Arithmetic #ConstructinganExampleCounterexample
MathterRiddler @MathterRiddler · Jan 24 Puzzle from the Mathter website - Cutting: mathter.islands.co.il/en/questions/4… #Puzzle #AreaCalculation #ConstructinganExampleCounterexample #CutaShapeDissectionProblems #GridPaperGeometryLatticeGeometry 1 4
MathterRiddler @MathterRiddler · Jan 22 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/1… #Puzzle #Arithmetic #ConstructinganExampleCounterexample #Sequences 5
MathterRiddler @MathterRiddler · Jan 17 Puzzle from the Mathter website - Sets in the Plane: mathter.islands.co.il/en/questions/5… #Puzzle #Circles #ConstructinganExampleCounterexample #SetTheory #ProofbyContradiction #MinimumandMaximumProblemsOptimizationProblems 10
MathterRiddler @MathterRiddler · Jan 1 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/1… #Puzzle #ConstructinganExampleCounterexample #Sequences #Fractions #AveragesMeans #MinimumandMaximumProblemsOptimizationProblems 1
MathterRiddler @MathterRiddler · Dec 14, 2025 Puzzle from the Mathter website - Magic Number 15: mathter.islands.co.il/en/questions/1… #Puzzle #DivisibilityRulesby3and9 #ConstructinganExampleCounterexample #DivisibilityRulesby5and25 #Division
MathterRiddler @MathterRiddler · Dec 12, 2025 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/2… #Puzzle #Triangles #ConstructinganExampleCounterexample #CutaShapeDissectionProblems 5
MathterRiddler @MathterRiddler · Dec 1, 2025 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/3… #Puzzle #ConstructinganExampleCounterexample #CaseAnalysisCheckingCases #ProbabilityTheory #Paradoxes 1
MathterRiddler @MathterRiddler · Nov 16, 2025 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/1… #Puzzle #ParityEvenOdd #ConstructinganExampleCounterexample #PrimeFactorization 1
MathterRiddler @MathterRiddler · Nov 14, 2025 Puzzle from the Mathter website - Cutting: mathter.islands.co.il/en/questions/4… #Puzzle #AreaCalculation #ConstructinganExampleCounterexample #CutaShapeDissectionProblems #GridPaperGeometryLatticeGeometry 3
MathterRiddler @MathterRiddler · Oct 30, 2025 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/1… #Puzzle #ParityEvenOdd #ConstructinganExampleCounterexample #PrimeFactorization 1
MathterRiddler @MathterRiddler · Oct 11, 2025 Puzzle from the Mathter website: mathter.islands.co.il/en/questions/3… #Puzzle #ConstructinganExampleCounterexample #EuclideanAlgorithm #Division #DiophantineEquations 3