Quantitative Aptitude - Arithmetic Ability Questions

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 metres, then the speed of the aeroplane in km/hr. is

After buying a toy for Rs.45, Raghu managed to sell it at a profit of 15%. The selling price of the toy was

If 12x2 - ax + 7 = ax2 + 9x + 3 has only one (repeated) solution, then the positive integral solution of a is

If 60 boys can finish a work in 15 days by working 8 hours a day, then how many hours a day should 72 boys work to finish that work within 20 days?

An angle is greater than its complementary angle by 40°. Find the measure of the angle?

A triangle is circumscribed on the circle of centre O in such a way that sides AB = 12 cm, BQ = 7 cm and CQ = 5 cm. Calculate the lengtth (in cm) of side AC.

What will come in the place of the question mark (?) in the following number series?305, 338, 404, 503, 635 , (?)

By what least number should 1200 be multiplied so that it becomes a perfect square?