Download App

Number System — Maths STD 9 — Question

CBSE BoardEnglish MediumSTD 9MathsNumber System1 Mark
MCQ
Statement-1 (A): $\pi$ is an irrational number.
Statement-2 (R): Euler's constant e is an irrational number.
  • A
    Statement-1 and Statement-2 are True; Statement-2 is a correct explanation for Statement-2
  • ✓
    Statement-1 and Statement-2 are True; Statement-2 is not a correct explanation for Statement-1.
  • C
    Statement-1 is True, Statement-2 is False.
  • D
    Statement-1 is False, Statement-2 is True.
✓

Answer

Correct option: B.
Statement-1 and Statement-2 are True; Statement-2 is not a correct explanation for Statement-1.
(b)
$\pi$ and $e$ both are irrational numbers. It is not correct to say that is irrational because e is irrational. Thus, both the statements are true and statement-2 is not a correct explanation for statement-1. So, options (b) is correct.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion (A) & Reason (B) MCQ" from Number System→Number System — all question types→Maths STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The modal value for the following set of data is $16, 12, 14, 16, 18, 26, 16, 20, 16, 11, 12, 16, 15, 20, 24.$
Reason: The modal value for the following set of data are $86, 88, 85, 86, 86, 88, 88, 90, 91, 95.$
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the vertices of triangle $ABC$ are $A(5, -1), B(-3, -2) C(-1, 8)$ the length of median A through will be $\sqrt{65}.$
Reason: A line intersects the $y$ - axis and $x$ - axis at the points $P$ and $Q$. If $(2, -5)$ is the mid - point of $PQ$, then the coordinates of $P$ and $Q$ will be $\frac{1}{3}.$
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: $x^3+x$ has only one real zero.
Reason: A quadratic polynomial can have at most two zero.
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: All the rational and irrational number makes up the collection of real number.
Reason: if r is rational and s is irrational then $r + s$ and $r - s$ are irraational number.
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: The locus of points which is at a same distance from single point is called as ellipse.
 Reason: Two lines are said to be perpendicular when angle between them is $80^\circ$.
→
Assertion (A): Rational number lying between two rational numbers a and b is $\frac{a+b}{2}$.
Reason (R): There is one rational number lying between any two rational numbers.
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: In $ \triangle\text{ABC},$ AB = AC and $\angle\text{B} = 50^\circ,$ then $\angle\text{C}$ is $50^\circ $.
Reason: Angles opposite to equal sides of a triangle are equal.
→
Statement-1 (A): The graph of the linear equation 2x - y + 18 = 0 meets x-axis at (-9, 0).
Statement-2 (R): Coordinates of points on y-axis are of the form (0, a), where a is a variable.
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: Diagonal of parallogram are divide into two congruent triangle.
Reason: In a parallelogram opposite angle are not equal.
→
Directions: In the following questions, the Assertions $(A)$ and Reason(s) $(R)$ have been put forward. Read both the statements carefully and choose the correct alternative from the following:
Assertion: If the area of an equilateral triangle is $81\sqrt3\text{cm}^2,$ then the semi perimeter of triangle is $20.$
Reason: Semi perimeter of a triangle is $\text{s}=\frac{(\text{a}+\text{b}+\text{c})}{2},$ where $a, b, c$ are sides of triangle.
→