#### MINIMUM PROBLEM-20

Proposed by Pavlos Trifon-Greece MINIMUM PROBLEM-20 Solution by proposer

#### MINIMUM PROBLEM-18

Proposed by Jalil Hajimir-Toronto-Canada MINIMUM PROBLEM-18 Solution by Daniel Sitaru-Romania

#### MINIMUM PROBLEM-17

Proposed by Hung Nguyen Viet-Hanoi-Vietnam MINIMUM PROBLEM-17 Solution by Tran Hong -Dong Thap-Vietnam

#### MINIMUM PROBLEM-16

Proposed by Marin Chirciu-Romania MINIMUM PROBLEM-16 Solution by Adrian Popa-Romania

#### MINIMUM PROBLEM-15

Proposed by Marin Chirciu-Romania MINIMUM PROBLEM-15 Solution by Tran Hong-Dong Thap-Vietnam

#### MINIMUM PROBLEM-14

Proposed by Jalil Hajimir-Toronto-Canada MINIMUM PROBLEM-14 Solution 1 by Adrian Popa-Romania, Solution 2 by Marian Dinca-Romania

#### MINIMUM PROBLEM-13

Proposed by Minh Tam Le-Vietnam MINIMUM PROBLEM-13 Solution by Tran Hong-Dong Thap-Vietnam

#### MINIMUM PROBLEM-11

Proposed by Le Ngo Duc-Vietnam MINIMUM PROBLEM-11 Solution 1 by Tran Hong-Dong Thap-Vietnam, Solution 2 by Michael Sterghiou-Greece

#### MINIMUM PROBLEM-7

Proposed by Hoang Le Nhat Tung-Hanoi-Vietnam MINIMUM PROBLEM-7 Solution by Nguyen Van Nho-Nghe An-Vietnam

#### MINIMMUM PROBLEM-9

Proposed by Hoang Le Nhat Tung-Hanoi-Vietnam MINIMMUM PROBLEM-9 Solution by Do Huu Duc Thinh-Ho Chi Minh-Vietnam