1)if x+y-z=3, x-y+z=8 and -x+y+z=4, then the average value of x,y,z is
a)2 b)9 c)3 d)5

2)If 4x^2-x-4=0, then the value of (x- 1/x) is
a)3 b)1 c)-1 d)1/4

3) Which temple is located at the tallest place of Nepal?
a)Syombhu
b)Muktinath
c)Changunarayan
d)Manakamana

4)If the arithmetic mean of 12 numbers is 12. If the numbers in the ratio of 1:3:9 are added, the mean become 12.2 . Find the number?
a)3,9,27
b)1,3,9
c)1/3,1,3
d)1/9,1/3,1

5) Find the dy/dx of y=sinx+cos^2x
a)cosx+2sinx b)cosx-sin2x
c)sinx+cosx d)None

6)A universal set is
a)the superset of every set under consideration
b)the subset of every set under consideration
c) the set of all real number
d) the set of complex number​