Quantitative Aptitude - Arithmetic Ability Questions

If 1/2 is added to a number and the sum is multipled by 3, the result is 21. Then the number is

If 9x - [5(2x + 1)/2] = 9/2, then the value of x is?

If x+1/x = 2, then the value of x7+2/x6 is equal to?

In a circle of radius 8 cm, AB and AC are two chords such that AB = AC = 12 cm. What is the length of chord BC?

Marked price of an item is Rs 200. On purchase of 1 item discount is 5%, on purchase of 2 items discount is 14%. Rajeshri buys 3 items, what is the effective discount? 

If (5x – y)/(5x + y) = 3/7, then what is the value of (4x2 + y2 – 4xy)/(9x2 + 16y2 + 24xy) ?

In ∆ABCif the median AD=1/2 BC, then ∠BAC is

If secA + tanA = x, then the value of x is