Quantitative Aptitude - Arithmetic Ability Questions

A Number is increased by 20%. To get back to the orignal number, the increased number is to be reduced by

If P = 350 and Q = 600, then P is how much percentage less than Q?

If the value of 3-1.732, then calculate the value of 243-12108-147

What is the value of [(sin 7x – sin 5x)÷(cos 7x + cos 5x)] – [(cos 6x – cos 4x)÷(sin 6x + sin 4x)]?

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

If x = 1/(√2+1) then the value of x2 + 2x - 1 is

What will be the net discount (in percentage) for two successive discounts of 30% and 20%?

On walking 100 metres towards a building in a horizontal line, the angle of elevation of its top changes from 45 to 60 deg. What will be the height (in metres) of the building?