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# CBSE Class 10 Pre Board 2020 : Mathematics Basic (Kendriya Vidyalaya (KV), Lucknow Region)

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KENDRIYA VIDYALAYA SANGATHAN ,LUCKNOW REGION PREBOARD EXAMINATION-2019-20 CLASS-X TIME-3HRS SUB-BASIC MATHS M.M-80 GENERAL INSTRUCTIONS: QUESTIONS 1-20(1MARK),21-26(2MARKS), 27-34(3Marks),35-40(4MARKS). SECTION-A(1x20 marks) M.C.Q Choose right option of the following; Q1) In an A.P,if a=3.5,d=0,n=101,then an= a)0 b)3.5 c)104.5 d)103.5 2 Q2) The surface area of sphere is 616cm ,its radius is -------.Use( =22/7) a)19 b)7 c)-7 d)14 Q3) The pair of equations 2x-3y=1 and 3x-2y=4 has--------a)One solution b)two solution c)no solution d)many solution Q4) If tanA=cot(30 +A),then A= a) 45 b) 30 c) 135 d)60 Q5) Sides of a triangle are given below, which of these is a right triangle? a)7cm,5cm,24cm b)34cm,30cm,16cm c)4cm,3cm,7cm d)8cm,12cm,14cm 2 Q6) Which of the following is a solution of the quadratic equation 2x +x-6=0? a)x=2 b)x= -12 c)x=3/2 d)x = -3 Q7) The common point where tangent to a circle touches the circle is called----------a)secant b)point of contact c)tangent d)circle Q8) The perimeter of a sector of angle 45 of a circle with radius 7cm is a)19cm b)19.5cm c)19/3cm d)77cm Q9) The value of tan48 tan23 tan42 tan67 is a)1 b)9 c)8 d)0 Q10) The L.C.M of smallest two digit composite number and smallest composite number is a)44 b)4 c)12 d)20 Q.11- Find the value of k for which the points (7,-2), (5, 1) and (3, k) are collinear. Q.12- Find the 8th term of 117, 104, 91, 78 .. Q.13 Find the value of cos180/sin 720. Q.14 Give two different examples of pair of similar figures. Q.15 If AB is a tangent drawn from a point A to a circle with centre O and BOC is diameter of the circle such that angle AOC = 1200, than find angle OAB . Q.16- Find the angle of elevation of the sun s altitude when the height of shadow of a vertical pole is equal to its height . Q.17- If the sum of the zeroes of the polynomial f (x) = 2x3 3kx2 + 4x 5 is 6, then find the value of k. Q.18- State Euclid`s division lemma. Q.19- Find the value of K for which the system of equations x 2y = 3 and 3x + ky = 1 has a unique solution. Q20. What is the HCF of 23 x 5 and 22 x 52 ?

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