A student multiplies a number by 5/3 instead of 3/5. What is the percentage error in the calculation?

A whole number is added to 50 and the same number is subtracted from 50. The sum of the resulting numbers is 

The diameter of the circle with center O is AB. PQ is the chord that does not intersect AB. Join AP and BQ. If ∠BAP = ∠ABQ,  then what will be ABQP?

In how much time will a sum of Rs. 12500 amounts to Rs. 20000 at the rate of 8 percent per annum at simple interest?

The rates of working of A and B are in the ratio of 2 : 3. The number of days taken by each of them to finish the work is in the ratio : 

By selling 33 metres of cloth a person gain the cost price of 11 metres. find the gain%

 If 3x²-5x+1=0, then the value of ( $$x^2+{1\over 9x^2}$$) is 

Directions: A survery of film watching habits of people living in five cities P, Q, R, S and T is summarised below in a table. The coulmn I in the table gives percentage of film-watchers in each city who see only one film a week. The column II gives the total number of film-watchers who see two or more films per week.

Read the table and answer the following questions.

The highest number of film watchers in any given city is :