Cubes and Cube Roots

46. The cube root of a number x is denoted by

  • (A) ±∛x
  • (B) ∛x
  • (C) –∛x
  • (D) None of these

45. How many zeros will be there in the cube of 100?

  • (A) 5
  • (B) 8
  • (C) 9
  • (D) 6

44. The cube of 0.3 is

  • (A) 0.207
  • (B) 0.27
  • (C) 0.0027
  • (D) 0.027

43. Cube of 1.2 is

  • (A) 17.38
  • (B) 1.728
  • (C) 1.718
  • (D) 17.28

42. The cube root of 729 is

  • (A) 13
  • (B) 23
  • (C) 9
  • (D) 19

41. How many times each prime factor appears in its cube?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

40. The cube of 0.4 is 0.064.

  • (A) 0.64
  • (B) 0.604
  • (C) 0.064
  • (D) 0.046

39. The cube root of 8000 is

  • (A) 40
  • (B) 20
  • (C) 200
  • (D) 400

38. ∛1000 is equal to

  • (a) 10
  • (b) 100
  • (c) 1
  • (d) None of these

37. The one’s digit of the cube of 23 is

  • (a) 6
  • (b) 7
  • (c) 3
  • (d) 9

36. Which of the following numbers is a perfect cube?

  • (a) 243
  • (b) 216
  • (c) 392
  • (d) 8640

35. Which of the following numbers is not a perfect cube?

  • (a) 216
  • (b) 567
  • (c) 125
  • (d) 343

34. Cube of a number ending in 7 will end in the digit

  • (A) 5
  • (B) 3
  • (C) 2
  • (D) 4

33. The cube of an odd number is always

  • (A) an even number
  • (B) an odd number
  • (C) a multiple of 3
  • (D) a multiple of 7

32. How many perfect cubes are there between the numbers 1 and 100?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

31. Number of perfect cubes between 102 and 123 is

  • (A) 13
  • (B) 23
  • (C) 9
  • (D) 19

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