Quantitative Aptitude - Arithmetic Ability Questions

One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?

Which of the below given fractions is NOT equal to 9/17?

A cylinder of radius 4.5 cm and height 12 cm just fits in another cylinder completely with their axis perpendicular. What is the radius (in cm) of second cylinder?

What is the value of tan 7π/4?

ΔDEF is right angled at E. If m∠D = 45°, then find the value of (tanF + 1/3).

Sum of a fraction and thrice of its reciprocal is 73/20. What is the fraction?

Convert binary 10110 to decimal.

What are the co-ordinates of the centroid of a triangle, whose vertices are A(-2,5), B(3,-2) and C(5,3)?