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Maths Assertion (A) & Reason (B) MCQ

MODEL PAPER 6 (BASIC) · CBSE STD 10 (CBSE - English Medium). 2 questions.

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Assertion (A) & Reason (B) MCQ

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2 questions · timed · auto-graded

MCQ 11 Mark
Assertion (A): The H.C.F. of two numbers is 16 and their product is 3072. Then their L.C.M. = 162
 Reason (R): If a, b are two positive integers, then H.C.F. x L.C.M. = a x b
  • 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) A is false but $R$ is true. Explanation:  $\frac{3072}{16}=192 \neq 162$
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MCQ 21 Mark
Assertion (A): Image of point (5, -16) under x-axis is (-5, 16).
Reason (R): To find image of point (x, y) under x-axis change the sign of y and to find image under y-axis change sign of x.
  • 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) A is false but $R$ is true.
Explanation:  Rule: Image of $( x , y )$ under x -axis is given by $( x ,- y )$ and under y -axis given by $(- x , y )$.
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Assertion (A) & Reason (B) MCQ - Maths STD 10 Questions - Vidyadip