A sum when invested at a certain rate of simple interest

Select the figure that will come next in the following figure-series. 

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.

In the data set given below, what is the difference between the Median and the Mode?

{2.1, 5, 6, 7, 8, 9.3,11,15, 17, 19.21, 27, 31, 31, 33, 16.5, 14, 10}

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.

76 * 34 * 23 * 12 * 6 * 21

E M 3 P 5 7 R T V Z 9 D I F Q X 4 6 H I 2 8 W