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CBSE CLASS X

31. 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

32. 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

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

34. 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

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

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

37. 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

38. 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

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

    

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

40. 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

Submitted By Mr. Janak Raj Kalia
Email Id : [email protected]