#### PROBLEM 842-THE PENTAGON JOURNAL

Proposed by Jose Luiz Diaz Barrero-Bercelona-Spain SOLUTION 842 Solution by Marian Ursarescu-Romania

#### PROBLEM W13-JOSZEF WILDT

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain PROBLEM W13 Solution 1 by Adrian Popa-Romania, Solution 2 by Ravi Prakash-New Delhi-India

#### PROBLEM 833-THE PENTAGON JOURNAL

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain PROBLEM 833 Solution 1 by Marian Ursarescu-Romania, Solution 2 by Michael Sterghiou-Greece, Solution 3…

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#### PROBLEM 4085-CRUX MATHEMATICORUM

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain PROBLEM 4085-CRUX Solution by Myagmarsuren Yadamsuren-Darkhan-Mongolia

#### PROBLEM 5533-SSMA MAGAZINE

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain 5533 Solution 1 by Naren Bhandari-Bajura-Nepal, Solution 2 by Ravi Prakash-New Delhi-India

#### PROBLEM 5527-SSMA MAGAZINE

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain 5527 Solution by Tran Hong-Dong Thap-Vietnam

#### PROBLEM 5509-SSMA MAGAZINE

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

#### PROBLEM W12-JOSZEF WILDT

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain SOLUTION W12 Solution 1 by Ravi Prakash-New Delhi-India, Solution 2 by Remus Florin Stanca-Romania,…

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#### PROBLEM W10-JOSZEF WILDT

Proposed by Jose Luiz Diaz Barrero-Barcelona-Spain SOLUTION W10 Solution 1 by Artan Ajredni-Presheva-Serbie, Solution 2 by Ravi Prakash-New Delhi-India, Solution…

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