Quantitative Aptitude - Arithmetic Ability Questions

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

The amount (in Rs) received at 10% per annum compound interest after 3 yrs is Rs 1,19,790. What was the principal?

A can do a work in 16 days and B in 20 days. If they work on it together for 8 days, then what fraction of work is left?

A person borrows some money for 8 years at a rate of simple interest. If the ratio of principal and total interest is 5 : 8, then what is the rate ( inpercentage) of interest?

X can finish 25% of a work in a day. Y can do 12.5% of the same work in a day. In how many days, will both of them finish the work together?

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

An isosceles triangle ABC has sides AB = AC. If side BA is produced to D in such a manner that AC=AD. Then what will the measure of the angle BCD?

A batsman in his 12th innings makes a score of 120, and thereby increase his average by 5. The average score after 12th innings is