Quantitative Aptitude - Arithmetic Ability Questions

If on a Sale there is 40% discount on the marked price of Rs 1000, but the sale is done at Rs 510 only then what additional discount (in %) did the customer get?

What is the measure of an interior angle of a regular decagon?

Simplify: (213 x 213 + 187 x 187)

The mean of 21 observations (all different) is 40. If each observation greater than the median is increased by 21, then the mean of observations will become:

After selling 5% of a quantity of sugar, 5 Kgs of sugar remains . Find the total quantity of sugar?

A man sells an article at a profit of 35%. If he had bought it for 15% less price and sold it for Rs. 32 less, then he would have gained 40%. What is the initial cost price (in Rs) of the article?

x, y and z are prime numbers and x + y + z = 38. What is the maximum value of x?

What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?