Calculate the length (in cm) of PQ, if the radius of the circle is 7 cm and the line through the centre O meets the tangent at point Q such that OP = 25 cm.
The line graph shows the number of students who passed with distinction in the given year from a certain university. Study the diagram and answer the following questions.
What was the difference in the number of students who passed with distinction between the years 2017 and 2014?