Quantitative Aptitude - Arithmetic Ability Questions

If √(1 - sin2A) = x, then the value of x is

(61 + 62 + 63 + ......... +110) = ?

A solid copper sphere of radius 9 cm is melted and reformed into a wire of radius 1 mm. What will be the length of this wire? (Take π = 22/7)

On a certain principal if the Simple interest for two years is Rs 3000 and Compound interest for the two years is Rs 3225, what is the rate of Interest?

Two trains are moving in the opposite direction at speed of 30 km/hr and 45 km/hr respectively, whose lengths are 450 m and 550 m respectively. What is the time taken (in seconds) by slower train to cross the faster train?

The average age of a class of 6 girls is x years. Four new girls having ages x – 2, x + 2, x + 4 and x + 6 joins the class. What is the new average age (in years) of the class?

If the product of two numbers is 4941 and their LCM is 81, then their HCF is :

If x and y are natural numbers such that x + y = 2017, then what is the value of (– 1)x+ (– 1)y?