International Science Conference-2017 was organized at Chicago in May 2017. In the conference, researchers from four different continents, namely Americas, Europe, Asia and Australia participated. Each researcher presented his/her research on exactly one of the four subjects. namely Physics, Chemistry. Mathematics or Statistics.

The following pie-chart shows the break-up of the researchers from different continents who participated in the conference. The following partially-filled table gives information on the number of researchers from different continents in different subjects who participated in the conference.

It is known that all the blank entries in the table given above are different natural numbers.

Q1.What can be the minimum number of researchers from the four continents who participated in the conference?

 Q2.If the ratio of the number of researchers on Physics from Americas to the number of researchers on Statistics from Australia was a natural number N, then what can be the minimum value of N?

Q3. If the number of researchers on Statistics was more than the number of researchers on any other subject, then what can be the maximum number of researchers from Americas who participated in the conference?

Q4.If in all, 66 researchers from Asia participated in the conference, then what was the total number of researchers who participated in the conference?

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