5 Hardest Puzzle,100% fail answers

Mathematical puzzles make up an integral part of recreational mathematics. They have specific rules, but they do not usually involve competition between two or more players. Instead, to solve such a puzzle, the solver must find a solution that satisfies the given conditions. Mathematical puzzles require mathematics to solve them. Logic puzzles are a common type of mathematical puzzle.
                                                                                                                                          [wikipedia]

Solve the problems below and post your answer in comment section.Let's start to test your IQ


Problem 1
Hardest mathematical puzzle
Solve this puzzle

Problem 2

Find the missing number
Find the missing number
Problem 3
No body can solve this puzzle
Solve this puzzle
Problem 4
Toughest Puzzle
Find the missing one
Problem 5
hardest puzzle in the world
Solve this puzzle


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