Quantitative Aptitude - Arithmetic Ability Questions

If cos 45° - ­ sec 30° = x, then value of x is

Let O be the orthocentre of the triangle ABC. If ∠BOC = 150°, Then ∠BAC is

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is

What is the value of (cosec30 - 1/√3)?

What are the co-ordinates of the centroid of a triangle, whose vertices are A(1, -5), B(4, 0) and C(-2, 2)?

If (X/4) = (Y/5) = (Z/9), then what is X : Y : Z?

The compound interest earned in two years at 15% per annum is Rs 20640. What is the sum invested (in Rs)?

Three numbers are in Arithmetic Progression (AP) whose sum is 30 and the product is 910. Then the greatest number in the AP is