Quantitative Aptitude - Arithmetic Ability Questions

In a committee there are 25 members. If two members whose ages are 64 years and 40 years are replaced by the two new members, then average age of 25 members is decreased by 2 years. What is the average age (in years) of the new members?

To cover a distance of 90 km in 2.5 hours what should be the average speed of the car in meters/second?

The ten's digit of a 2­digit number is greater than the units digit by 4. If we subtract 36 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

An equal sum is invested in two different schemes. One scheme gives simple interest and the other gives compound interest (annual compounding). The sum of interest obtained after 2 years from both the schemes is Rs 2961. If both schemes have 23% per annum interest rate, then what is the first year interest (in Rs)of simple interest scheme?

At what rate of compound interest per annum will a sum of Rs 20000 become Rs 25088 in 2 years?

In a circle, two arcs of unequal length subtend angles in the ratio 5:3. If the smaller angle is 45° then the measure of other angle in degrees.

Coefficient of x2 in (x + 9)(6 -­ 4x) is

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