Quantitative Aptitude - Arithmetic Ability Questions

If the selling price is doubled, the profit triples. The profit percent is

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given options.

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

ΔABC is right angled at B. BD is the altitude. AD is 18 cm and DC is 50 cm. Find length of BD?

A photographer allows a discount of 10% on the advertised price of a camera. The price (in Rs) that must be marked on the camera, which cost him Rs 600, to make a profit of 20% would be

The price of rice has increased by 60%. In order to restore the original price, the new price must be reduced by

The area of an equilateral triangle is 9√3 sq cm, find its perimeter?

A and B invest Rs. 3000 and Rs. 2400 respectively in a business. If after one year there is a loss of Rs. 720, how much loss will B bear? (Loss or Profit is in proportion to their investments)