MCQ for Class 8 Maths Chapter 12 Exponents and Powers with Answers
MCQ Questions for Class 8 Maths Chapter 12 Exponents and Powers with Answers
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Board CBSE
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TextBook NCERT
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CLASS Class 8
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SUBJECT Maths
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CHAPTER Chapter 12
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SUBJECT Exponents and Powers
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Topic Multiple Choice Questions
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Square and Square Roots
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Also Visit: 1.MCQ Class 8 Science
Question 1. am × an × ap =
(i) amnp
(ii) am+n+p
(iii) am-n+p
(iv) am-n+p
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Answer1. (ii) am+n+p
[Exponent Rule: when exponent terms with the same bases (here 'a' is base) are multiplied then we will add their powers or exponents. ]
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Question 2. am ÷ an =
(i) am + n
(ii) amn
(iii) am - n
(iv) am/n
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Answer 2: (iii) am - n
[Exponent Rule: when exponent terms with the same bases (here 'a' is base) are divide then their powers or exponents are subtracted]
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Question 3. (a x) y =
(i) a xy
(ii) a x+y
(iii) a x-y
(iv) none of the above
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Answer 3: (i) a xy
[ Power and power of a exponent term are multiplied]
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Question 4. (a x) × (bx) =
(i) (a + b)x
(ii) abx + x
(iii) (ab)x
(iv) none of the above
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Answer 4: (iii) (ab)x
[ When powers of the exponent terms are same and they are multiplied then bases are multiplied]
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Question 5. (a -n) =
(i) a (1/n)
(ii) (1/an)
(iii) -(a n)
(iv) none of the above
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Answer 5: (ii) (1/an)
[ When we reciprocal an exponent term than signs of its power will change that is from negative to positive or from positive to negative]
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Question 6. a0 =
(i) zero
(ii) infinite
(iii) one
(iv) none of the above
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Answer 6: (iii) one
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Question 7. (abc)0 =
(i) one
(ii) zero
(iii) infinite
(iv) none of the above
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Answer 7: (i) one
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Question 8. (12)0 =
(i) one
(ii) zero
(iii) twelve
(iv) infinite
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Answer 8: (i) one
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Question 9. (anything)0 =
(i) zero
(ii) one
(iii) anything
(iv) infinite
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Answer 9: (ii) one
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Question 10. (a)1 =
(i) a
(ii) one
(iii) zero
(iv) none of the above
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Answer 10: (i) a
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Question 11. (23)1 =
(i) 23
(ii) 1
(iii) 0
(iv) none of the above
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Answer 11: (i) 23
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Question 12. (anything)1 =
(i)
(ii) one
(iii) infinite
(iv) zero
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Answer 12: (i) anything
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Question 13. (3 × 3 × 3 × 3) =
(i) 33
(ii) 34
(iii) 43
(iv) none of the above
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Answer 13: (ii) 34
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Question 14. mx in this exponent term, the base is
(i) m
(ii) x
(iii) mx
(iv) none of the above
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Answer 14: (i) m
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Question 15. 20m in this exponent term, the power is
(i) 20
(ii) m
(iii) 20m
(iv) none of the above
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Answer 15: (ii) m
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Question 16. 8-1 =
(i) 8
(ii) -8
(iii) (⅛)
(iv) none of the above
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Answer 16: (iii) (⅛)
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Question 17. The multiplicative inverse of 3-2 is
(i) 0
(ii) 3/2
(iii) 2/3
(iv) 3²
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Answer 17: (iv) 3²
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Question 18. The multiplicative inverse of (⅕) is
(i) 5
(ii) -5
(iii) 0
(iv) none of the above
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Answer 18: (i) 5
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Question 19. The multiplicative inverse of dm is
(i) -dm
(ii) d
(iii) dm
(iv) none of the above
MCQ Questions for Class 8 Maths Chapter 12 Exponents and Powers with Answers
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Answer 19: (iii) dm
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Question 20. 6⁴ ×6-2 =
(i) 62
(ii) 66
(iii) 1
(iv) none of the above
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Answer 20: (i) 62
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Question 21. (-3)6 × (-3)-5 =
(i) 3
(ii) -3
(iii) (⅓)
(iv) -(⅓)
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Answer 21: (ii) -3
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Question 22.( 8-2) ÷(8-5) =
(i) 87
(ii) 8²
(iii) 8-7
(iv) 8³
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Answer 22: (iv) 8³
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Question 23. 8¹ × 8² × 8³ =
(i) 86
(ii) 85
(iii) 89
(iv) 8⁴
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Answer 23: (i) 86
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Question 24. {(8²)³}⁴
(i) 87
(ii) 89
(iii) 824
(iv) none of the above
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Answer 24: (iii) 824
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Question 25. (¼)-2 =
(i) -4²
(ii) 2⁴
(iii) 4²
(iv) none of the above
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Answer 25: (iii) 4²
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Question 26. (2-1 × 3-1) ÷ 2-3 =
(i) (¾)
(ii) (4/3)
(iii) (3/2)
(iv) none of the above
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Answer 26: (ii) (4/3)
[(2-1 × 3-1) ÷ 2-3
=(½ × ⅓) ÷ 2-3
= (⅙)÷ (1/2³)
= (⅙) × 8
= (4/3)
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Question 27. (8¹× 9¹ ×50)0 =
(i) 72
(ii) 17
(iii) 1
(iv) 0
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Answer 27: (iv) 0
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Question 28. 4² × 4m = 412, find the value of 'm'
(i) 10
(ii) 12
(iii) 14
(iv) 16
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Answer 28: m = 10
[4² × 4m = 412
→ 42+m = 412
→2 + m = 12
→ m = 12 - 2
→ m = 10]
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Question 29. (-1)32 =
(i) -1
(ii) 32
(iii) 1
(iv) none of the above
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Answer 29: (iii) 1
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Question 30. (1)81 =
(i) 1
(ii) 81
(iii) -1
(iv) none of the above
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Answer 30: (i) 1
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Question 31.
46300000000 is equal to
(i) 4.63 × 1010
(ii) 4.63 × 1011
(iii) 4.63 × 1012
(iv) none of the above
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Answer 31: (i) 4.63 × 1010
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Question 32.
4000000 is equal to
(i) 4 × 105
(ii) 4 × 106
(iii) 4 × 107
(iv) none of the above
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Answer 32: (ii) 4 × 106
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Question 33.
0.000005 is equal to
(i)5 × 10-5
(ii) 5 × 10-6
(iii) 5 × 10-7
(iv) none of the above
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Answer 33: (ii) 5 × 10-6
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Question 34.
0.13200 is equal to
(i) 1.32 × 10-3
(ii) 1.32 × 10-4
(iii) 1.32 × 10-5
(iv) none of the above
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Answer 34: (ii) 1.32 × 10-4
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Question 35.
34567 is equal to
(i) 3.4567 × 10⁴
(ii) 3.4567 × 10³
(iii) 3.4567 × 10²
(iv) none of the above
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Answer 35: (i) 3.4567 × 10⁴
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MCQ Questions for Class 8 Maths Chapter 12 Exponents and Powers with Answers
