Quantitative Aptitude - Arithmetic Ability Questions

The average of 7 numbers is 30. If the average of first three numbers is 25 and that of last three numbers is 35, then what is the fourth number?

If PQ and PR be the two tangents to a circle with centre O such that ∠QPR = 120° then ∠POQ is

If y=2-x1+x, then what is the value of 1y+1 + 2y+1y2-1 ?

What is the sum of the first 12 terms of an arithmetic progression if the first term is 3 and last term is 47?

A Lawn roller makes 20 revolutions in one hour. The radius it runs through 25 minutes is

A bus is running at a speed of 90 kmph. What distance will it cover in 20 seconds?

What is the place value and face value of 9 in 68956 respectively?

If (tanA ­- tanB)/(1 + tanAtanB) = x, then the value of x is