Quantitative Aptitude - Arithmetic Ability Questions

If the amount received at the end of 2nd and 3rd year as Compound Interest on a certain Principal is Rs 2100, and Rs 2268 respectively, what is the rate (in %) of interest?

Atul and Binay together complete a piece of work in 5 days. If Binay alone can complete the same work in 8 days, how many days Atul take to complete the same work alone?

If a2+1=9a, (a≠0) then the value of a2+1a2 is

If A purchase 9 chairs for Rs 5 and sells all the chairs at the rate of 5 chairs for Rs 9, then what will be the profit percentage?

How much quantity (in kg) of wheat costing Rs 84 per kg must be mixed with 81 kg of wheat costing Rs 60 per kg so that on selling the mixture at Rs 75.9 per kg, there is a gain of 15%?

What is the reflection of the point (5 , -1) in the line y = 2?

A can do a work in 15 days and B in 20 days. If they work on it together for 6 days, then what fraction of work is left?

What least number must be added to 4131, so that the sum is completely divisible by 19?