Quantitative Aptitude - Arithmetic Ability Questions

If 2x + 3y – 5z = 18, 3x + 2y + z = 29 and x + y + 3z = 17, then what is the value of xy + yz + zx?

Rs 260200 is divided between Ram and Shyam so that the amount that Ram receives in 3 years is the same as that Shyam receives in 6 years. If the interest is compounded annually at the rate of 4% per annum then Ram's share is

Find the LCM of 0.63, 10.5, 2.1, 4.20

The expression 52n –23n has a factor?

A thief is stopped by a policeman from a distance of 400 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed of the thief as 5 km/h and that of policeman as 9 km/h, how far the thief would have run, before he is over -taken by the policeman?

A shopkeeper by selling 5 items, earns a profit equal to the selling price of 1 item. What is his profit percentage?

What is the simplified value of sin2(90–θ)–[sin(90–θ)sinθ/tanθ]?

The angles of elevation of the top of a tree 220 meters high from two points lie on the same plane are 30° and 45°. What is the distance (in metres) between the two points?