Quantitative Aptitude - Arithmetic Ability Questions

Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill? 

The length, breadth and height of a cuboid are 12 cm, 8 cm and 6 cm respectively. The volume of the cuboid is (Use π = 22/7)

The lengths of the two diagonals of a rhombus are 5 cm and 12 cm. Find its area (in cm2)

If a+1a=1,then the value of a2-a+1a2+a+1 is a≠0

What is the value of Cot 45° - (1/√3)Cosec 60°?

What is the value of 99992 x 100008?

What are the co­ordinates of the centroid of a triangle, whose vertices are A(­2,­5), B(4,­4) and C(7,3)?

Find the odd word/letters/number pair from the given alternatives