If a man estimates his loss as 20% of the selling price, then his loss percent is:

200 meter long train crosses a bridge with the speed of 54 km/hrs. in 30 sec. Find the length of bridge?

A bag contains 30 balls, numbered 1 to 30. Two balls are drawn at random. What is the probability that the balls drawn contain a number which is multiple of 4 or 6 but not a multiple of both?

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

In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hour? 

Seema is 8 years elder than his sister and 7 years younger than her brother Raj. When Raj was born, her father’s age was 30 and when Seema’s sister was born his mother’s age was 34. Find the difference between ages of Seema’s father and his mother?

The ratio of two numbers is 3:8 and their difference is 115. The smaller of the two numbers is: