CBSE ADDA

1. ABC is right angled at A. The value of tan B . tan C is _______ (a) tan B                      (b) tan C                     (c) 0                            (d) 1 2. If the mean of 2, 4, 6, 8, 10, x, 14, 16 is 9 then the value of x is (a) 10                           (b) 11                           (c) 12                           (d) 13 3. The relationship in mean, median and mode is (a) Mode = 2 median – 3 mean                      (b) Mode = 2 median - mean (c) Mode = 3 median + 2 mean                       (d) Mode = 3 median – 2 mean 4. If x = tan 2° · tan 36° · tan 54° · tan 88° then the value of x is ______ (a) 45°                                     (b) 1                             (c) 2                             (d) 90° 5. Which of these numbers always ends with the digit 6? Where n is a natural number. (a) 4 n                            (b) 2 n                           (c) 6 n                           (d) 8 n 6. For a pair to be c

Preparation of Question Bank of classes IX & X for Term - I (September 2011) Class X New Marking scheme CBSE sample paper 10th Polynomials polynomials grade 10 test paper Polynomials-linear equation test paper Polynomial test paper for class 10 10th Math Test Paper (15)

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1. In  Δ  PQR, given that S is a point on PQ such that ST II  QR and PS/SQ=3/5 If PR = 5.6 cm, then find PT. 2. In  Δ  ABC, AE is the external bisector of <A, meeting BC produced at E. If AB = 10 cm, AC = 6 cm and BC = 12 cm, then find CE. 3. P and Q are points on sides AB and AC respectively, of  Δ ABC. If AP = 3 cm,PB = 6 cm, AQ = 5 cm and QC = 10 cm, show that BC = 3 PQ. 4. The image of a tree on the film of a camera is of length 35 mm, the distance from the lens to the film is 42 mm and the distance from the lens to the tree is 6 m. How tall is the portion of the tree being photographed? 5. D is the midpoint of the side BC of  Δ  ABC. If P and Q are points on AB and on AC such that DP bisects <BDA and DQ bisects <ADC, then prove that PQ II BC. 6. If a straight line is drawn parallel to one side of a triangle intersecting the other two sides, then it divides the two sides in the same ratio. 7. If a straight line divides any two sides of a triangle in the same ratio,