Quantitative Aptitude - Arithmetic Ability Questions

The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = 22/7)

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

The sum of squares of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is

If cosA/(1 - sinA) = x, then the value of x is

If x = a cosθ+ b sinθ and y = b cosθ- a sinθ, then x2 + y2 is equal to

When a number x is divided by a divisor it is seen that the divisor = 4 times the quotient = double the remainder. If the remainder is 80 then the value of x is

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

Two numbers are 35% and 40% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?