The following line graph gives the percentage of the number of candidates who qualified an examination out of the total number of candidates who appeared for the examination over a period of seven years from 1994 to 2000.

The difference between the percentage of candidates qualified to appeared was maximum in which of the following pairs of years?

The numerator of a fraction is multiple of two numbers. One of the numbers is greater than the other by 2. The greater number is smaller than the denominator by 4. If the denominator 7 + C ( C > - 7 ) is a constant, then the minimum value of the fraction is :

1008 divided by which single-digit number gives a perfect square?

The number of pairs of positive integers whose sum is 99 and HCF is 9 is: 

The number of digits in the square root of 625686734489 is 

A work is done in 16 days by 8 labours. They worked together for 2 days and after that 8 additional labours joined them. The rest work will be finished by them in ______

Subjects, there were 9 boys and some girls. In a test, the mean score obtained by the boys was 13 while that obtained by the girls was 15. If the overall average was 14.28, what was the total number of students in the class?