Quantitative Aptitude - Arithmetic Ability Questions

Aparna changes the marked price of an item to 50% above its C.P. What % of discount allowed in approximately to gain 10%?

The age of A is three times the age of B. What is the ratio of the age of B to the age of A?

Sahil sold an item for Rs. 280 at a loss of 20%. The cost price of the item was

Find the greatest number which on dividing 1580 and 3800 leaves remainders 8 and 1 respectively.

The surface area of a sphere is 5544 sq.cm. Find its diameter (in cm).

A right circular conical structure stands on a circular base of 21m diameter and is 14m in height. The total cost of colour washing for its curved surface at Rs. 6 per sq. m. is
(Take Π = 22/7 )

 Out of two numbers, 65% of the smaller number is equal to 45% of the larger number. If the sum of the numbers is 2574, then what is the value of larger number? 

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