Quantitative Aptitude - Arithmetic Ability Questions

In a class, 60% of children like Mathematics, 45% like Science and 25% like both Mathematics and Science. What is the percentage of children who like at least one subject?

If 9x+2 = 240 + 9x, the value of (8x)x is

What is the value of Cot 45°+ 1/3 Cosec 60°?

If x = √2+1, then the value of x4-1/x4

Study the information carefully to answer the following questions: An urn contains 5 red, 3 green, 2 blue and 4 yellow marbles. If three marbles are picked at random, what is the probability that one is green and two are yellow?

Find the volume (in cub.cm) of a sphere of diameter 42 cm

ΔABC and ΔDEF are two similar triangles and the perimeter of ΔABC and ΔDEF are 30 cm and 18 cm respectively. If length of DE = 36 cm, then length of AB is

The tops of two poles of height 60 metres and 35 metres are connected by a rope. If the rope makes an angle with the horizontal whose tangent is 5/9 metres, then what is the distance (in metres) between the two poles?