If x+y+z = 0 , then what is the value of $\frac{x^{2}}{3z}+\frac{y^{2}}{3xz}+\frac{z^{2}}{3x}$
1). 0
2). xz
3). y
4). 3y
If x= $\sqrt{\frac{2+\sqrt{3}}{2-\sqrt{3}}}$ , then hat is the value of $x^{2}-x-9$
1). 0
2). $3\sqrt{2}$
3). $3\sqrt{3}$
4). $5\sqrt{3}$
If x + y = 5, $x^{3}+y^{3}$ = 35, then what is the positive difference between x and y?
1). 0
2). 1
3). 5
4). 6
Rohan borrowed a certain sum of money at simple interest. Rate of interest was 3% per annum for first 3 years, 4% per annum for next 5 years and 6% per annum for next 7 years. If he paid Rs 2059 as interest, then what is the sum borrowed (in Rs)?
1). 2400
2). 2500
3). 200
4). 3100
A man makes four trips of equal distances. His speed on first trip was 60 km/hr and in each subsequent trip his speed was half of the previous trip.What is the average speed (in km/hr) of the man in these four trips?
1). 16
2). 30
3). 28.125
4). 27.5