Quantitative Aptitude - Arithmetic Ability Questions

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

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together?

Find the odd word/letter/number from the given alternatives

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

If x + 1x = -2, then the value of x631 + 1x632?

In a triangle ABC, the length of in-radius and circum-radius is 2 units and 6 units respectively. Find the distance (in units) between the in-centre and circum-centre.

What is the value of Cot 45° + Cosec 60°?

The angle of elevation of the top of a hill at the foot of the tower is 60 deg and the angle of elevation of the top of the tower from the foot of the hill is 30 deg. If the tower is 50 m high, what is the height of the hill?