Quantitative Aptitude - Arithmetic Ability Questions

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 1,800, and Rs 1,926 respectively, what is the rate of interest?

If the amount received at 10% per annum Compound interest after 3 yrs is Rs 19965, then what will have been the principal (in Rs) amount?

If the sum of the measures of all the interior angles of polygon is 1800°, find the number of sides of the polygon?

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of

What is the effective discount (in %) on two successive discounts of 20% and 10%?

A mini-van crosses two people walking at the speed of 4.8 kmph and 6 kmph in the same direction as that in which the mini-van is heading in 4.5 s and 9 s, respectively. What is the length of the mini-van?

The sum of a non-zero number and twenty times its reciprocal is 9. What is the number?