Quantitative Aptitude - Arithmetic Ability Questions

If x -­ y = 7 and xy = 32, then value of (x2 + y2) is

A square ground is to be covered by planting 100 saplings on each side. How many saplings are needed in all?

Circum center of ΔABC is O. If ∡BAC = 75 and ∡BCA = 80 degrees,

then what is the value of ∡OAC(in deg)?

To cover a distance of 252 km in 2.5 hours what should be the average speed of the car in meters/second?

A canal of a village can be cleaned by 24 villagers in 12 days. The number of days in which 36 villagers can clean the canal is ?

In the given figure, ∠QRN = 40°, ∠PQR = 46° and MN is a tangent at R. What is the value (in deg) of x, y and z respectively?

5 hrs after a goods train passed a station, another train travelling at a speed of 70 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 9 hours. What is the speed of the goods train?

If 4x - 7y = 3 and 2x - y = 9, then x - y is.