If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

Study the following bar chart and answer the questions carefully.

Which of the companies shows the maximum percentage difference in sales turnover between the two years ?

Directions: The following table represents the percentage marks of four students in six subjects.
Consider the table and answer questions based on it

The average marks obtained by the students in Geography and History are

If a + a²+a³-1=0, then what is the value of a³ +(1/a)?

If A alone take 4 days more than A and B worked together. If B alone take 16 days more than A and B together. How many days they take together? 

What is the area (in cm²) of the circumcircle of a triangle whose sides are 6 cm, 8 cm and 10 cm respectively?

A, B and Center into a partnership with capitals in the ratio 5: 6: 8. At the end of the business term, they received the profit in the ratio 5: 3: 12. Find the ratio of time for which they contributed their capitals? 

If $$ {\sqrt{2x+9}+x=13}$$ then find the value of x?