Quantitative Aptitude - Arithmetic Ability Questions

If x = 313- 3-13, then 3x2 + 9xis equal to

Find the mean proportional between 2 and 98?

The smallest number that must be subtracted from 2800 so that the obtained number is a perfect square is

If  x = 2+3,then what is the value of 2x + 12x ?

The surface area of a sphere is 1386 cm2.  Find its diameter (in cm)

A 220 metres long train takes 33 seconds to cross a 440 metres long bridge. How much time (in seconds) will the train take to cross a 350 metres long bridge?

A table was sold at a profit of 10%. If its cost price was 5% less and it was sold for Rs. 7 more, the gain would have been 20%. Find the cost price of the table.

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son . The present age of Dr. Pandey's son is