If x = 3y = 5z; find (x-y+z):(x+y-z):(x-y-z) ?

What is the least number that should be added to 600 so that the sum is exactly divisible by 12, 15, 16 and 18?

Rekha, Hema and Kajal bought the same washing machine at the same MRP from 3 different dealers. All the dealers offered 2 discounts and subsequent cash backs after discount. Rekha got discounts of 5 percent and cashback of 20 percent, Hema got 16 percent discount and cash back of 15 percent, Kajal got 15 percent discount and cash back of 12 percent. Find out who purchased the machine at maximum price?

Find the average area of a square with side 2 cm, circle with radius 0.7 cm and equilateral triangle with side 3 cm?

A & B appeared in an examination. A scored 12 marks higher than B. A's marks were 60 percent of the sum total of marks scored by both of them. Find their individual scores.

A strip of LED lights contain 50 blue, 60 red, 60 yellow and 80 white LED bulbs. If 10 percent blue and white, 20 percent red and yellow are defective find the total percentage of defective light