On a pie chart there are six sectors of which four angles are 30°, 45°, 60°, 90° and the remaining two angles are in the ratio 2:1. Find the smallest angles of the remaining two angles.

The bar chart above shows the number of times the word "a, and , in, it, the ,to" appear in a paragraph in a book.

What is the ratio of the least frequent word to the most frequent word?

What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2?

Find the median of 4, 1, 4, 1, 0, 4, 4, 2 and 0

If x > 0, find the range of number x-3, 3x+2,x-1, 4x, 2x-1, x-2, 2x-2, 3x and 3x+1