Quantitative Aptitude - Arithmetic Ability Questions

In triangle ABC, O is the orthocenter and angle BOC is 120 deg. Calculate angle BAC.

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

An exterior angle of a triangle is 115 deg and one of the interior opposite angle is 45 deg. Then the other two angles are

What is the value of Cot 60°- Cos 45°?

Which of the following numbers is divisible by 12?

How many three digit whole numbers are there between 75 and 405?

Two trains are moving in the same direction at the speed of 42 km/hr and 84 km/hr, their lengths are 320 metres and 380 metres respectively. What is the time taken (in seconds) by faster train to cross the slower train?

In a triangle the length of the side opposite the angle which measures 30° is 9 cm, what is the length of the side opposite to the angle which measures 60°?