Quantitative Aptitude - Arithmetic Ability Questions

If cotA/√(1 + cot2A) = x, then the value of x is

Mummy can bake 75 cakes in 15 hours, Mummy and Sister together can bake 120 cakes in 20 hours. How many cakes Sister can bake in 30 hours?

Product of digits of a 2-digit number is 15. If we add 18 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

To cover a distance of 333 km in 2 hours by a car, what should be the average speed of the car (in meter/second)?

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

In ΔABC , DE || AC. Where D and E are two points lying on AB and BC respectively. If AB = 5 cm and AD = 3 cm, then BE : EC is

If  C+1C = 3, then what is the value of C3+1C3 = ?

If x = at2 and y = 2at then