Quantitative Aptitude - Arithmetic Ability Questions

Four numbers A, B, C and D are such that their overall average is 16. The average of A and B is 9.5. The average of C and D is

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

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

In the following question, select the odd letter/letters from the given alternatives.

A well of diameter 3 m and depth 14 m is dug. The earth, taken out of it, has been evenly spread all around it in the shape of a circular ring of width 4 m to form an embankment. Find the height of embankment?

In the following question, select the odd letter/letters from the given alternatives.

The area of a circle is 38.5 cm2. Find its circumference (in cm).

The difference between the ages of mother and son was 21 when mother's age was 43. If father is elder by 3 years to mother, what will be the difference between the ages of son and father when father attains 50 years?