Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A): L.C.M. and H.C.F. of a and 20 are 100 and 10 respectively, then a = 50.
Reason (R): L.C.M $\times$ H.C.F. $=$ First number $\times$ Second number

✓
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) Both A and R are true and R is the correct explanation of A.
Explanation: It is a result.

View full question & answer→

MCQ 21 Mark

Assertion (A): Distance of point (a, b) from origin is $\sqrt{b^2-a^2}$
Reason (R): Distance of point (x, y) from origin is $\sqrt{(x-0)^2+(y-0)^2}$

A
Both A and R are true and R is the correct explanation of A.
✓
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: B.

Both A and R are true but R is not the correct explanation of A.

(B) Both A and R are true but R is not the correct explanation of A.
Explanation: It will be $\sqrt{(a-0)^2+(b-0)^2}=\sqrt{a^2+b^2}$

View full question & answer→

Maths Assertion (A) & Reason (B) MCQ

Test yourself on this topic