MCQ Questions for Class 8 Math Chapter 7 Cube and Cube Roots with Answers
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MCQ Questions for Class 8 Math Chapter 7 Cube and Cube Roots with Answers
Choose the correct option from the following:
Question 1. The cube of every even numbers is
(a) odd number
(b) even number
(c) decimal number
(d) none of the above
Answer: (b) even number.
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Question 2. The cube of every odd numbers is
(a) odd number
(b) even number
(c) decimal number
(d) none of the above
Answer: (a) odd number.
Question 3. The cube of every negative integer is always
(a) positive
(b) negative
(c) some time positive and some time negative
(d) none of the above
Answer: (b) negative.
Question 4. How many digits are there in the cube root of 13824
(a) one
(b) two
(c) three
(d) four
Answer: (d) four; cube root of 13824 is 24
Question 5. What will be the unit digit of cube root of a number 32768
(a) 1
(b) 2
(c) 3
(d) 4
Answer: (b) 2. because the cube root of the number 32768 is 32
Question 6. What will be the one's place (unit place) digit of a cube of the number 23
(a) 3
(b) 8
(c) 9
(d) 0
Answer: (c) 9
because the one's place digit of 23 is 3 and we know the cubing the one's place digit will determine the end digit of the cube number. Here in case of 23, cube of 3 = 9
Question 7. Which is the perfect cube of the following numbers
(a) 220
(b) 200
(c) 224
(d) 216
Answer: (d) 216
because cube of 6 = 216
Question 8. Which is the perfect cube among the following numbers
(a) 8000
(b) 7000
(c)6000
(d) 5000
Answer: (a) 8000
Because 20 x 20 x 20 = 8000
Question 9. Which of the following is the perfect cube
(a) 1
(b) 2
(c) 3
(d) 4
Answer: (a) 1
because 1x1x1=1
Question 10. Which is the following number is the perfect cube
(a) 5
(b) 6
(c) 7
(d) 8
Answer: (d) 8
because 2x2x2=8
Question 11. One's place (units place) digit of the cube of the number 264 is
(a) 2
(b) 4
(c) 6
(d) 8
Answer: (b) 4
because cube of one's place digit that is 4x4x4=64
MCQ Questions for Class 8 Math Chapter 7 Cube and Cube Roots with Answers
Question 12. The one's place (unit place) digit of the cube of 201 is
(a) 1
(b) 2
(c) 3
(d) 4
Answer: (a) 1
because 1x1x1=1
Question 13. The one's place (unit place) digit of the cube of number 402 is
(a) 0
(b) 8
(c) 7
(d) 9
Answer: (b) 8
because 2x2x2=8
Question 14. The one's place (unit place) digit of the number 110 is
(a) 5
(b) 8
(c) 0
(d) 3
Answer: (c) 0
because 0x0x0=0
Question 15. The one's place (unit place) digit of the cube of the number 25 is
(a) 8
(b) 5
(c) 6
(d) 4
Answer: (b) 5
because 5x5x5=125
Question 16. The one's place (unit place) digit of the cube of the number 36 is
(a) 9
(b) 8
(c) 7
(d) 6
Answer: (d) 6
because 6x6x6=216
Question 17. The one's place (unit place) digit of the cube of the number 77 is
(a) 9
(b) 8
(c) 7
(d) 6
Answer: (a) 9
because 7x7x7=343
Question 18. The one's place or unit place digit of the cube of the number 88 is
(a) 5
(b) 7
(c) 2
(d) 0
Answer: (c) 2
because 8x8x8=512
Question 19. The one's place or unit place digit of the cube of the number 119 is
(a) 5
(b) 1
(c) 9
(d) 0
Answer: (b) 1
because 9x9x9= 729
Question 20. Write the smallest number by which 3456 is multiplied, the number become perfect square.
(a) 1
(b) 2
(c) 3
(d) 4
Answer: (d) 4
because 3456= 2×2×2×3×3×3×4×4=2³×3³×4²
Question 21. Write the smallest number by which when 320 is divided, number become perfect cube
(a) 3
(b) 4
(c) 5
(d) 6
Answer: (c) 5
Because 320= 4×4×4×5=4³×5
Question 22. Write the smallest number by which when 100000 is multiplied, the number become perfect cube
(a) 10
(b) 1
(c) 100
(d) 1000
Answer: 10
because 100000=10×10×10×10×10= 10³×10²
Question 23. Write the smallest number by which when 10000 is divided, the number become perfect cube
(a) 100
(b) 10
(c) 1
(d)0
Answer: (b) 10
because 10000=10×10×10×10=10³×10
Question 24. The smallest number by which when 500 is multiplied, the number become perfect cube
(a) 10
(b) 100
(c) 1
(d) 2
Answer: 2
because 500=5×5×5×2×2=5³×2²
Question 25. Write the smallest number by which when 125 multiplied the number become perfect cube
(a) 4
(b) 10
(c) 1
(d) 3
Answer: (c) 1
because 125=5×5×5=5³
Question 26. Write the cube root of 74088
(a)40
(b) 42
(c) 45
(d) 50
Answer: 42
because 74088=2×2×2×3×3×3×7×7×7
Question 27. Write the number of zeros in cube of 20
(a) 1
(b) 3
(c) 5
(d) 6
Answer: 3
because 20³= 8000
Question 28. Write the value of 5׳√8000
(a) 50
(b) 70
(c) 90
(d) 100
Answer: (d) 100
because 5× ³√8000 = 5 × 20= 100
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