Two train 120 meters and 160 meters in length are running towards each other on parallel lines at the speed of 70 kmph and 42 kmph respectively. How long will it take to cross each other after they meet?

The price of a pen, a book and a shirt are 56, 72, and 120 respectively. How much minimum rupees should a person take with him so that after purchasing either of articles in whole numbers he saves 20.

At present, the sum of the ages of A, B and C is 150 years, whereas 10 years ago, the ratio of their age was 5 : 4 : 3. Find the ratio of their ages after 10 years.

If a number x is 10% less than another number y and y is 10% more than 125, then x is equal to-

What would be the simple interest obtained on an amount of `6,535 at the rate of 10 % p.a. (percent per annum) after 6 years?

In how many years will be Rs. 2,000 amounts to Rs.2,420 at 10% per annum compound interest ?

Directions: Study the following data and answer the questions. 

The score of students of a class are given as follows :

The number of students whose IQ score is 100 and more is 

Directions: Study the following data and answer the questions. 

The score of students of a class are given as follows :

Number of students whose IQ score is 140 is