# 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