Quantitative Aptitude - Arithmetic Ability Questions

A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?

Simple interest on a sum for 18 months at 14% per annum is Rs 1365.What is the value (in Rs) of sum?

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is

ABCD is a quadrilateral with AB = 9 cm, BC = 40 cm, CD = 28 cm, DA = 15 cm and angle ABC is a right –angel
What is the area of quadrilateral ABCD?

Point P (8 , 5) is the midpoint of segment AB. Co-ordinates of A are (5, y) and B are (x, -3). What is the value of x?

Find two numbers such that their mean proportion is 8 and third proportion is 64.

In an alloy of German silver the ratio of copper to zinc was 17:7 while that of nickel to zinc was 4 :3. The ratio of copper to zinc to nickel in the alloy was