Mathematics Questions

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

In an alloy, there is 12% copper. To get 69 kg of copper, how much alloy is required?

A candidate scores 25% and fails by 30 marks. Another scores 50% and gets 20 marks more than pass. Find total marks.

If 5% of x = y, then y% of 20 is the same as:

Price of an article is reduced by 25%. In order to retain original price, the present price has to be increased by:

In a town, 40% of people are illiterate and 60% are poor. Among the rich, 10% are illiterate. What percentage of the poor population is illiterate?

If a student's marks are increased by 20%, they become 72. What were the original marks?

What is 12% of 400?

Express 0.01 as a percentage.

Find 200% of 20.

30 is what percent of 120?

What is 10% of Rs. 2000?

Fraction 1/2 is equal to which percentage?

A student gets 15 out of 25 in a test. What is his percentage?

Calculate 25% of 60.

What is 50% of 50?

What is 25% of 600?

Convert 3/5 into a percentage.

Find the value of x if 10% of x is 50.

Express 0.08 as a percentage.