An ore contains 25% of an alloy that has 90% iron. Other than this, in the remaining 75% of the ore, there is no iron. H…

A shopkeeper first raises the price of Jewellery by x% then he decreases the new price by x%. After such up down cycle, …

From 2000 onwards, till 2003 the price of computers increased every year by 10%. After that due to government subsidy th…

The population of a village increase by 5% annually. If its present population is 4410, then its population 2 years ago …

If 20% of a = b, then b% of 20 is the same as:

Subtracting 6% of x from x is equivalent to multiplying x by how much ?

Solve [180% of (?)] ÷ 2 = 504

If 120 is 20% of a number, then 120% of that number will be :