If the price of sugar is increased by 20%, then by what percent should a housewife reduce its consumption so that no expenditure on it increases?

50 grams of an alloy of gold and silver contains 80% gold by weight, how much more gold should be mixed in this metal so that the alloy contains 95% gold?

A number when divided by 899 gives a remainder 63. If the same number is divided by 29, the remainder will be

A school has 45% girls. If 80% of girls score more than 75% marks and 70% of the boys have score more than 75% marks. If a student is selected at random and is found to have more than 75% marks, find the probability of it being a boy.

Shopkeeper sold an article after allowing two successive discounts of 15% and 20% on it. If shopkeeper earned 2% profit on selling the article and total discount allowed by him is Rs. 192, then find cost price of the article?

If x = 222, y = 223 and z = 224, then find the value of x³+y³+z³-3xyz

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

(1110.02 + 89.81) ÷ ? – $${\sqrt{15}}$$= 15.98

The base of a right pyramid is a square of side 10 cm. If its height is 10 cm, then the are (in cm²) of its lateral surface is: