book Maths Puzzle Numerical Ability

I need to know the following question: "Who found the twenty-fifth number and in what year? Who found the twenty-sixth number and in what year?" I have tried to look all over the I

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PLEASE SHOW ME HOW DO I USE FOUR 4'S USING ANY MATHEMATICAL OPERATION.AND YOU MAY USE EXPONETS, FACTIONS, SQUARE ROOTS, DECIMAL POINTS, NEGATIVE NUMBERS, AND FACTORIALS.
EXAMPLES I need to solve by completing the square.

3x squared - 6x = 27

First I would move the 27 to the other side to get
3x squared-6x-27=0

a = 3
B = -6
C = -27

I am not sure what to do now.