#### PROBLEM 822-THE PENTAGON JOURNAL

Proposed by Daniel Sitaru-Romania SOLUTION 822 Solution 1 by Soumava Chakraborty-Kolkata-India, Solution 2 by Tran Hong-Vietnam

#### PROBLEM 824-THE PENTAGON JOURNAL

Proposed by Pedro Pantoja-Brazil SOLUTION 824 Solution by Khanh Hung Vu-Vietnam

#### PROBLEM 828-THE PENTAGON JOURNAL

Proposed by D.M.Batinetu-Giurgiu, Neculai Stanciu-Romania SOLUTION 828 Solution by Remus Florin Stanca-Romania

#### PROBLEM 823-THE PENTAGON JOURNAL

Proposed by Pedro Pantoja-Brazil SOLUTION 823 Solution 1 by Sanong Huayrerai-Nakon Pathom-Thailand, Solution 2 by Tran Hong-Vietnam

#### PROBLEM 827-THE PENTAGON JOURNAL

Proposed by D.M.Batinetu-Giurgiu, Neculai Stanciu-Romania SOLUTION 827 Solution 1 by Marian Ursarescu-Romania, Solution 2 by Shafiqur Rahman-Bangladesh, Solution 3 by…

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#### PROBLEM 5509-SSMA MAGAZINE

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain 5509 Solution by Tran Hong-Dong Thap-Vietnam

#### PROBLEM 5508-SSMA MAGAZINE

Proposed by Pedro Pantoja-Natal-Brazil 5508 Solution 1 by Sanong Huayrerai-Nakon Pathom-Thailand, Solution 2 by Tran Hong-Dong Thap-Vietnam, Solution 3 by…

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#### PROBLEM 5506-SSMA MAGAZINE

Proposed by Daniel Sitaru-Romania 5506 Solution 1 by Ravi Prakash-New Delhi-India, Solution 2 by Marian Ursarescu-Romania

#### PROBLEM W18-JOSZEF WILDT

Proposed by Daniel Sitaru-Romania SOLUTION W18 Solution by Ruangkhaw Chacka-Chiangrai-Thailand

#### PROBLEM W47-JOSZEF WILDT

Proposed by Nicusor Minculete-Romania SOLUTION W47 Solution by Marian Ursarescu-Romania