One number is 25% of another number. The larger number is 12 more than the smaller. The large number is

The cost price of 25 books is equal to the selling price of 20 books. The profit percent is

Consider the following chemical reaction :

aFe2O3(s) + bCO(g) + cFe(s) + dCO2

In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?

The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4:5.The ratio of their ages after 21 years will be

A shopkeeper marks his goods 40% above the cost price and allows a discount of 25% on it. His gain % is

X can do a piece of work in 'p' days and Y can do the same work in 'q' days . Then the number of days in which X and Y can together do that work is

General Dyer, who was responsible for Jallianwalan Bagh massacre, was shot dead by?

Green House Effect' means