Quantitative Aptitude - Arithmetic Ability Questions

Two successive discounts of 10% and 25% are given by Raman on a shirt. If the marked price of the shirt is Rs 600, then what is the value (in Rs) of discount?

The area and the length of one of the diagonals of a rhombus is 84 cm² and 7 cm respectively. Find the length of its other diagonal (in cm).

P bought an article for Rs. 1600 and sold it at a profit of 10%. What would have been the increase in the profit percent if it was sold for Rs. 1840?

If x + y = 12 and xy = 32, then what is the value of  x2 + y2 ?

A student multiplied a number by 6/7 instead of 7/6. What is the percentage error in the calculation?

Value of (4a2+ 12ab + 9b2)/(2a + 3b) is

What number should be added to each of the numbers 94, 24, 100 and 26, so that the resulting numbers are in continued proportion?

2 litre of pure alcohol is added to 6 litre, 40% alcohol solution. The percentage of water in the solution is _____ .