CBSE Important Questions

Mathmatics Class X

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  1. If the H.C.F. of 210 and 55 is expressible in the form 210�5 - 55y, then y=

    (a) 17

    (b) 18

    (c) 19

    (d) 20

  2. Students of a class are made to stand in rows. If one student is extra in a row,there would be 2 rows less. If one student is less in a row there would be 3 rows more. Then the number of
    students in the class is
    (a) 96

    (b) 64

    (c) 60

    (d) none of these

  3. The express sin A in terms of cot A is :

  1. Prime factorization of the denominator of the rational number 34. 12345 is of the form:

    (a) 2m ×5n where m, n are integers

    (b) 2m ×5 n where m, n are positive integers

    (c) 2m �5n where m, n are non-negative integers

    (d) denominator has factors other then 2 or 5

  2. A number between 10 and 100 is eight times the sum of its digits. If 45 is subtracted from it, the digits are reversed. Then the number is

    (a) 27

    (b) 72

    (c) 92

    (d) none of these

  3. The zeros of a quadratic polynomial are α and β .Then tje valus of m if

    4. (a) 6

    (b) 5

    (c) -6

    (d) -3

  1. In the following frequency distribution table, write the values of ( a, b, c , d ) is

    2. (a) ( 7 , 6 , 20 , 24 )

    (b) ( 6 , 7 , 20 , 24 )

    (c) ( 7 , 20 , 24 , 20 )

    (d) ( 6 , 7 , 24 , 20 )

  1. If one zero of is reciprocal of the other, then b =
  2. The zeroes of 5x2 − 7x + k are sin A, cos A. Then the value of k is ,

    3. (a) 12/7

    (b) 7/12

    (c) 12/5

    (d) 5/12

  1. If α ,β are the zeroes of then

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