Quantitative Aptitude - Arithmetic Ability Questions

The height of a cone is 45 cm. It is cut at a height of 15 cm from its base by a plane parallel to its base. If the volume of the smaller cone is 18480 cm3, then what is the volume (in cm3) of the original cone?

A group of boys has an average weight of 36 kg. One boy weighing 42 kg leaves the group and another boy weighing 30 kg joins the group. If the average now becomes 35.7 kg, then how many boys are there in the group?

If the selling price is doubled, the profit triples. The profit percent is

In the given figure, O is the centre of the circle and QOR = 50 deg, then what is the value of RPQ (in deg) ?

A student has to secure 40% marks to pass. He gets 67 and fails by 13 marks. What is the maximum marks?

What is the simplified value of cosec 2A + cot 2A?

25% discount is offered on an item. By applying a promo code the customer wins 22% cash back. What is the effective discount?

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is