Quantitative Aptitude - Arithmetic Ability Questions

If xy = -30 and x2 + y2 = 61, then find the value of (x + y).

If P=9, Q=17 then the value of p2-q2-13

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

x, y and z are prime numbers and x + y + z = 38. What is the maximum value of x?

A watch is listed for Rs.230 and is sold at a discount of 12%, then the sale price of the watch is

A shopkeeper, sold walnuts at the rate Rs 1,190 a kg and bears a loss of 10%. Now if he decides to sell it at Rs 1,249.5 per kg, what will be the result?

What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?

What will be the acute angle between the hour-hand and the minute -hand at 2:13 p.m?