Romanian Mathematical Magazine

Monthly Archives: September 2017

09/21/2017

PROBLEM 210-CUTTHEKNOTMATH

Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/arithmetic/algebra/DanSitaruCyclicInequality4.shtml Solution by Ravi Prakash-New Delhi-India Published by Alexander Bogomolny-USA

09/21/2017

PROBLEM 209-CUTTHEKNOTMATH

Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/arithmetic/algebra/ConstraintInequality20.shtml Solution 1 by Boris Colakovic-Belgrade-Serbia, Solution 2 by proposer, Solution 3 by Nguyen Thanh Nho-Tra…
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09/21/2017

PROBLEM 4133-CRUX MATHEMATICORUM

Proposed by D.M.Batinetu-Giurgiu, Neculai Stanciu-Romania PROBLEM 4133 Solution 1 by Marian Ursarescu-Romania, Solution 2 by Soumitra Mandal-Chandar Nagore-India

09/21/2017

PROBLEM 207-CUTTHEKNOTMATH

Proposed by Daniel Sitaru-Romania https://www.cut-the-knot.org/triangle/TwoSetsOfCevians.shtml Solution 1 by proposer, Solution 2 by Amit Itagi-USA Published by Alexander Bogomolny-USA  

09/21/2017

ACYCLIC, ASYMMETRICAL INEQUALITY-47

Proposed by Daniel Sitaru-Romania ACYCLIC,ASYMMETRICAL INEQUALITY-47 Solution 1 by Abdul Aziz-Semarang-Indonesia, Solution 2 by Pham Quoc Sang-Ho Chi Minh-Vietnam

09/21/2017

ACYCLIC, ASYMMETRICAL INEQUALITY-46

Proposed by Daniel Sitaru-Romania ACYCLIC, ASYMMETRICAL INEQUALITY-46 Solution 1 by Abdelhak Maoukouf-Casablanca-Morocco, Solution 2 by Soumitra Mandal-Chandar Nagore-India

09/20/2017

ACYCLIC, ASYMMETRICAL INEQUALITY-45

Proposed by Daniel Sitaru-Romania ACYCLIC, ASYMMETRICAL INEQUALITY-45 Solution by Ravi Prakash-New Delhi-India

09/20/2017

ACYCLIC, ASYMMETRICAL INEQUALITY-44

Proposed by Daniel Sitaru-Romania ACYCLIC, ASYMMETRICAL INEQUALITY-44 Solution 1 by Abdelhak Maoukouf-Casablanca-Morocco, Solution 2 by Abdallah Almalih-Damascus-Syria

09/20/2017

CYCLIC INEQUALITY-275

Proposed by Daniel Sitaru-Romania CYCLIC INEQUALITY-275 Solution 1 by Hung Nguyen Viet-Hanoi-Vietnam, Solution 2 by proposer

09/19/2017

CYCLIC INEQUALITY-274

Proposed by Daniel Sitaru-Romania CYCLIC INEQUALITY-274 Solution by Ravi Prakash-New Delhi-India