Quantitative Aptitude - Arithmetic Ability Questions

The third proportional of two numbers 9 and 15 is

If x and y are natural numbers such that x + y = 2017, then what is the value of (– 1)x+ (– 1)y?

A vendor buys bananas at 7 for Rs 6 and sells at 6 for Rs 7. What will be the result?

A dishonest milkman buys milk at Rs 24 per litre and adds 1/3 of water to it and sells the mixture at Rs 32 per litre. What is his gain?

A can do a piece of work in 6 days working 8 hours a day while B can do the same work in 4 days working 10 hours a day. If the work has to be completed in 5 days, so how many hours do they need to work together in a day?

A dealer sold an article at 6% loss. Had he sold it for Rs. 64 more, he would have made a profit of 10%. Then the cost of the article is

When a number is increased by 32, it becomes 116% of itself. What is the number?

Simplify: (213 x 213 + 187 x 187)