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MATHS Assertion (A) & Reason (B) MCQ

Exponents and Powers · Rajasthan Board (RBSE) STD 8 (Rajasthan - English Medium). 60 questions.

Questions · Page 2 of 2

Assertion (A) & Reason (B) MCQ

MCQ 511 Mark
Assertion (A): 384467000 is equal to 3.84467 × 108.
Reasons (R): An exponent refers to the number of times a number is multiplied by itself.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 521 Mark
Assertion (A): (-2)-5 x (-2)6 is equal to 2.
Reasons (R): product of powers property
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 531 Mark
Assertion (A): (2-1 + 3-1 + 5-1)0 is equal to 2.
Reasons (R): The power of a number says how many times to use the number in a multiplication.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 541 Mark
Assertion (A): (20 + 4-1) × 22 is equal to 6.
Reasons (R): The power of a number says how many times to use the number in a multiplication.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 551 Mark
Assertion (A): (-1)51 is equal to 1.
Reasons (R): An exponent refers to the number of times a number is multiplied by itself.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 561 Mark
Assertion (A): (-1)50 is equal to 50.
Reasons (R): An exponent refers to the number of times a number is multiplied by itself.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 571 Mark
Assertion (A): 1.5 × 1011 is equal to 150000000000.
Reasons (R): An exponent refers to the number of times a number is multiplied by itself.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 581 Mark
Assertion (A): 149600000000 is equal to 1.496 × 1011.
Reasons (R): An exponent refers to the number of times a number is multiplied by itself.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 591 Mark
Assertion (A): 10-1 is equal to -1.
Reasons (R): The power of a number says how many times to use the number in a multiplication.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
D
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MCQ 601 Mark
Assertion (A): am × bm is equal to (ab)m.
Reasons (R): power of a product property.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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