PAST CBSE EXAMINATION QUESTIONS IN MATHS ( FOR STANDARD X)

PAST CBSE QUESTIONSQuestion 1Find the class marks of the classes , 10 – 25 and 35 – 55 [ 2008 ]Question 2 Find the HCF x LCM of the numbers 100 and 190 [ 2008 ]Question 3In triangle LMN , angle L = 500 and angle N = 600. If triangle LMN is similar to triangle PQR , find L Q [ 2008 ]Question 4Complete the missing entries in the following factor tree. [2008]Question 5 If 1 is a zero of the polynomial , P(x) = ax2 – 3(a – 1) x – 1, find the value of a [ 2009]Question 6 If find the value of k[2009]Question 7Find the number of solutions of the following pair of linear equations X+ 2y – 8 = 0 2x+ 4y = 16 [ 2009 ]Question 8Find all the zeroes of the polynomial, x3 + 3x2 – 2x – 6 if two of its zeroes are [ 2009 ]Question 9Prove that is an irrational number [2009] Question 10If find the value ofQuestion 11 Find the value of tan 600 geometrically [ 2009]Question 12 Solve for x and y : [ 2009]Question 13In the figure , triangle ABD is right angled at A and AC is perpendicular to BD. Prove that AB2 = BC . BD [ 2009]Question 14Evaluate : [2009]Question15 :In the figure , AD perpendicular to BC and BD = 1/3 CD.Prove that 2CA2 = 2 AB2 + BC2 [2009]ANSWERS(1) 17.5 , 45(2) 19000(3) L Q = 700(4) 21 , 42(5)a = 1(6) k = 1(7) infinitely many of solutions(8) two zeroes are already given. Third zero is -3(9) Proof(10)225/64(11) (12) x = b and y = -a(13)Proof(14) -1Good luck !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!If anyone needs private online tuition may contact me at :georgeignatiusxx@gmail.com [g-talk]georgeignatius9 [Skype]