Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 1xp-q+1+1xq-p+1?

P(3,1) and R(-7,5) are vertices of a rhombus PQRS. What is the equation of diagonal QS?

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

A trader buys 800 kgs of tomatoes for Rs 7200. 10% tomatoes are damaged in transportaion. At what rate (Rs/Kg) should he sell the rest to earn 30% profit?

If the cost price of an article is Rs x . It is marked up by 100%. It is sold at Rs 1,200 after giving 20% discount. What is value of x?

For an amount, simple interest at the rate of interest of 12% per annum for 6 years is Rs 25920. What will be the compound interest (in Rs) on same amount at the rate of interest of 8% per annum compounding annually for 2 years?

The average marks of 56 students is shown as 60. It includes a wrong entry of 92 marks instead of 29 marks. The correct average is _____ .