1) 1 + Cot2 x= ? a) Cosec2 x b) tan2 x c) Sec2 x d) Cos2 x 2) If log7 x =2 then the value of x is: a) x2 =7 b) 2x =7 c) 27 =x d) 72 =x 3) The third proportion to 6 and 18 is: a) 12 b) 54 c) 36 d) 324 4) The square root of (a-b)2 is: a) ± (a-b) b) ±(a-b)(a-b) c) ±(a+b) d) none of these 5) A set which contains all the sets under consideration is called: a) universal b) null c) sub d) none of these 6) The set A={2,3,5,7,11,.................} is closed with respect to: a) addition b) multiplication c) division d) none of these 7) A triangle having no sides congruent is called: a) right b) obtuse c) isosceles d) scalene 8) If (x+2, 3y-6) = (2x,y), then x=?: a) 4 b) 2 c) 6 d) none of these 9) If a,b,c are in continued proportion, then: a) ab = c2 b) a2 =bc c) ac = b2 d) none of these 10) Line segment joining the vertex to the mid point of the opposite side of a triangle is called: a) altitude b) centroid c) median d) none of these 11) (9,-3) is in ............... quadrant / axis: a) 1st b) 4th c) x d) y 12) The scientific notation of 756837 is: a) 7.56837 x 105 b) 7.56837 x 10-5 c) 7.56837 x 10-4 d) none of these 13) If mean X=6, n=5, then ∑x=?: a) 1.5 b) 1.2 c) 30 d) 11 14) Cosec (90º-30º)=Sec ...............?: a) 30º b) 60º c) 90º d) none of these 15) The central angle of a minor arc is ............. than the inscribed angle of its corresponding major arc: a) less b) double c) half d) none of these 16) The short cut formula of arithmetic mean is: a) ∑x/n b) A+ ∑fD/∑f c) n+1 d) 2 e) ∑fx/n 17) The reciprocal of Cot x is: a) 1/cos x b) tan x c) 1/tan x d) none of these 18) The set of first three prime numbers is: a) {1,2,3} b) {2,3,5} c) {1,3,5} d) {2,3,7} 19) If √x = 9, then x=?: a) 3 b) ±3 c) 81 d) 1/2 20) y√x, y is called the ................ of the root: a) radical b) quantity c) index d) none of these

Math X 2015

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