Arithmetic

A's income is 10% more than B's, and B's income is 20% less than C's. If C earns Rs. 10000, find A's income.

The population of a town increases by 10% in first year and decreases by 10% in second year. If population after 2 years is 19800, find original population.

If 20% of (A + B) = 50% of (A - B), find the ratio of A to B.

A mixture of 20kg of salt and water contains 10% salt. How much water must be added to make it a 5% salt mixture?

If length, breadth and height of a cube are all increased by 10%, the volume increases by:

A trader marks his goods 20% above CP and allows 10% discount. Find his profit percentage.

If 10% of A = 20% of B = 30% of C, find A:B:C.

A's salary is 50% more than B's. How much percent is B's salary less than A's?

What is the single equivalent discount for successive discounts of 10% and 20%?

If the price of petrol increases by 25%, and a person wants to spend only 10% more on petrol, by how much % should he reduce consumption?

The value of a machine depreciates 10% annually. If its current value is Rs. 81000, what was its value 2 years ago?

40% of a number is equal to 3/5th of another number. Find the ratio of first number to second number.

In an examination, 80% candidates passed in English and 85% passed in Mathematics. If 73% passed in both, find the percentage of candidates who failed in both.

A number is increased by 20%. To get back to the original number, it must be reduced by:

If 50% of (x-y) = 30% of (x+y), what percent of x is y?

If 20% of an electricity bill is deducted, Rs. 100 is still to be paid. How much was the original bill?

The population of a city increases at 5% p.a. If current is 926100, what was it 3 years ago?

If 10% of x is the same as 20% of y, then x:y is:

A spends 40% on food, 20% on rent, 10% on entertainment and 10% on conveyance. If his savings are Rs. 1500, find his income.

What is the percentage increase in area of a circle if its radius is doubled?