Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word from the given alternatives.

Find the odd word/letters/number from the given alternatives.

If selling price is Rs. 72 and Gain percentage = 20%, calculate the Cost Price.

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

An equilateral triangle of area 300 cm2 is cut from its three vertices to form a regular hexagon. Area of hexagon is what percent of the area of triangle?

Working 10 hours a day, Aman can complete a piece of work in 18 days. How many hours a day should he work so as to finish the work in 15 days?

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

Find out the odd word/letters/number/number pair from the given alternatives.