Which component of a disc harrow prevents clogging and

Number of cars sold by W in the 3^rdQrtr is approximately what percent of the number of cars sold by Y in the 2^ndQrtr.?

Find the difference between the average no. of cars sold by V in all the 3 Qrtrs to the total no. of cars sold by Y in all 3 Qrtrs?

Monthly expenditure of a family on different heads is shown in the following pie chart.

Ratio between which of the following is the second lowest.

What is the ratio of number of cars sold by X, Y and Z in the 3^rd Qtr. to the number of cars sold by V, W and Z in the 1^stQrtr?