1) (√x+√y)(√x-√y) =? a) (√x+√y)2 b) (√x-√y)2 c) (√x-√y) d) (x-y) 2) In a right-angled triangle the side opposite to the right angle is: a) diagonal b) hypotenuse c) median d) altitude 3) The mean proportion to 75 and 12 is: a) ±20 b) ±10 c) ±30 d) ±40 4) The ordered pair (0,2) lies in/on: a) 1st quadrant b) 4th quadrant c) x-axis d) y-axis 5) The cartesian product of set A and set B is written as: a) A.B b) A X B c) A∆B d) BXA 6) One and only one plane passes through ................ non-collinear points. a) one b) two c) three d) none of these 7) (64)-1/6 =? a) 1 b) 0 c) 1/2 d) 1/4 8) In similar triangles .................. are congruent. a) sides b) angles c) angles and sides d) hypotenuse 9) If loga 16=4 a=? a) 4 b) 2 c) 1/4 d) 3 10) sin x . sec x=? a) 1 b) 2 c) cot x d) tan x 11) If x=1 and y=1, then value of x-y+xy =? a) 1 b) 0 c) 2 d) -1 12) If a:b=c:d, then a:c=b:d,. This property is called: a) dividando b) alternando c) invertando d) componendo 13) The L.C.M of x3-y3 and x6-y6 =? a) x2-y2 b) x2+y2 c) x5+y5 d) x6-y6 14) The point of concurrency of the medians of a triangle is called: a) centroid b) in-center c) circum-center d) ortho-center 15) Eliminate 'b' from a+3b =-1 and a+b =3, the new relation=? a) a=5 b) a=-2 c) a=7 d) a=4 16) If the S.D of a series is 4, then its variance =? a) 20 b) 30 c) 16 d) 2 17) If √2y-3 = √3y+4 , y=? a) 5 b) 7 c) -7 d) 7/5 18) The chord which passes through the center of a circle is called: a) diameter b) radius c) secant d) tangent 19) If two angles are complementary, each of them is a/an .................angle. a) right b) obtuse c) acute d) none of these

Math X 2010

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