Quantitative Aptitude - Arithmetic Ability Questions

Point Q(-2,b) is the midpoint of segment EF. Co-ordinates of E are (-7,-6) and F are (a,0). What is the value of a and b?

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

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

If the perimeter of a semicircle is 108 cm, then find its area (in cm²).

A sum of Rs 10000 becomes Rs 14641 when invested at compound interest at the yearly interest rate of 20% per annum. If the compounding is done half yearly, then for how many years was the sum invested?

Rohit buys a ball for Rs 450 and sells it. Rohit gives two successive discount of 20% and 5% to the customer. What will be the selling price (in Rs) of the ball?

Select the odd number from the given alternatives.

If u+v = 10 and uv = 16, then find the value of u2-v2uv