09/27/2017
INEQUALITY IN TRIANGLE-563
Proposed by Daniel Sitaru-Romania INEQUALITY IN TRIANGLE-563 Solution by Soumava Chakraborty-Kolkata-India
09/27/2017
ELEGANT INEQUALITY-72
Proposed by Daniel Sitaru-Romania ELEGANT INEQUALITY-72 Proposed by Abdelhak Maoukouf-Casablanca-Morocco
09/25/2017
PROBLEM 228-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/triangle/InequalityMostlyWithMedians.shtml Solution 1 by Soumava Chakraborty-Kolkata-India, Solution 2 by Soumitra Mandal-Chandar Nagore-India Published by Alexander Bogomolny-USA…
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09/25/2017
PROBLEM 227-CUTTHEKNOTMATH
Proposed by Mehmet Sahin-Ankara-Turkey https://www.cut-the-knot.org/triangle/Angle135.shtml Solution by Daniel Sitaru-Romania Published by Alexander Bogomolny-USA
09/25/2017
PROBLEM 226-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/m/Geometry/InequalityInCyclicQuadrilateral4.shtml Solution by proposer Published by Alexander Bogomolny-USA
09/25/2017
PROBLEM 225-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/m/Geometry/InequalityInCyclicQuadrilateral3.shtml Solution by proposer Published by Alexander Bogomolny-USA
09/25/2017
PROBLEM 224-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/triangle/InequalityForSidesAndArea.shtml Solution by proposer Published by Alexander Bogomolny-USA
09/25/2017
PROBLEM 223-CUTTHEKNOTMATH
Proposed by Mehmet Sahin-Ankara-Turkey https://www.cut-the-knot.org/triangle/InradiiCircumradii2.shtml Solution 1 by Daniel Sitaru-Romania, Solution 2 by Marian Dinca-Romania, Solution 3 by Miguel Ochoa…
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09/24/2017
PROBLEM 222-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/m/Algebra/InequalityInFourWeightedVariables.shtml Solution 1 by Kevin Soto Palacios-Huarmey-Peru, Solution 2 by Amit Itagi-USA, Solution 3 by proposer…
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09/24/2017
PROBLEM 221-CUTTHEKNOTMATH
Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/m/Algebra/TrickyIntegral.shtml Solution by Ravi Prakash-New Delhi-India Published by Alexander Bogomolny-USA