CBSE Important Questions

Mathmatics Class X

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  1. If product of the HCF and LM of the smallest prime number and the smallest composite number is:
    1. 2
    2. 4
    3. 6
    4. 8

  1. If n is any natural number, then which of the following expression ends with 0:
    1. (3 x 2)n
    2. (4 x 3)n
    3. (2 x 5)n
    4. (6 x 2)n

  1. If a, b are co prime, then a2 , b2 are:
    1. Coprime
    2. Not Coprime
    3. Odd numbers
    4. Even numbers

  1. The decimal expansion of the rational number 43 / 24 x 53 will terminate after:
    1. a = bq + r, 0 < r < b
    2. a = bq + r, 0<= r <=b
    3. a = bq + r, 0<= r < b
    4. a = bq + r, 0 < b < r

  1. Which of the following is not an irrational number?
    1. 5 - v3
    2. v5 + v3
    3. 4 + v2
    4. 5 + v9

  1. Which of the following is rational?
    1. v6 + v9
    2. v2 + v4
    3. v4 + v9
    4. v3 + v5

  1. Euclid's division lemma states that if a and b two positive integer, then there exist unique integer q and r such that:
    1. a = bq + r, 0 < r < b
    2. a = bq + r, 0 <= r <=b
    3. a - bq + r, 0 <= r < b
    4. a - bq + r, 0 <=b < r

  1. Which is the following rational number have a terminating decimal expansion?
    1. 125/ 441
    2. 77 / 210
    3. 15 / 1600
    4. 129 / 22 x 52 x 72

  1. The value of x in the factor tree is:

    1. 30
    2. 150
    3. 100
    4. 50

  1. Which of the following rational number have non terminating and repeating decimal expansion?
    1. 15 / 1600
    2. 17 / 6
    3. 23 / 8
    4. 35 / 50
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