BlackRock Interview Puzzle

BlackRock Interview Puzzle Solution - 23 March

In a party, there are five people and a whole round cake lying at the center of table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of piece?

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Please refer to the picture. If the four people cut along with the line, everyone will get an equal piece.