Quantitative Aptitude - Arithmetic Ability Questions

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

Find two numbers such that their mean proportion is 16 and third proportion is 1024.

Choose the odd word/letters/number/number pair from the given alternatives.

If cos ­-11π/6 = x, then the value of x is

Two circles touch each other at point X. A common tangent touch them at two distinct points Y and Z. If another tangent passing through X cut YZ at A and XA= 16 cm, then what is the value (in cm) of YZ?

The sum of two numbers is 7 and the sum their squares is 23, their product is equal to:

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

A man travels some distance at a speed of 12 km/hr and returns at a speed of 9 km/hr. If the total time taken by him is 2 hrs 20 min, the distance is