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Q1
mcq
1 mark
The H.C.F. of any two prime numbers is
Correct Answer: C —
Solution
By definition, a prime number has exactly two factors: 1 and itself. Since two distinct prime numbers share no common factors other than 1, their Highest Common Factor (H.C.F.) must be 1. Options A, B, and D are incorrect because they do not satisfy the definition of prime factorization.
Q2
mcq
1 mark
The degree of the polynomial $P(x) = 3x^3 - 8x^2 + 6x - 3$ is
Correct Answer: A —
Solution
The degree of a polynomial in one variable is defined as the highest power of the variable present in the expression. In the polynomial $P(x) = 3x^3 - 8x^2 + 6x - 3$, the powers of $x$ are 3, 2, 1, and 0. The highest power is 3; therefore, the degree is 3.
Q3
mcq
1 mark
The coordinates of the midpoint of the line segment joining the points $(3, 4)$ and $(5, 6)$ is
-
A.
$( - 4, - 5 )$
-
B.
$( 4, 5 )$
-
C.
$( 4, - 5 )$
-
D.
$( - 4, 5 )$
Correct Answer: B —
Solution
The midpoint formula for two points $(x_1, y_1)$ and $(x_2, y_2)$ is $(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2})$. Substituting the given coordinates $(3, 4)$ and $(5, 6)$, we get $(\frac{3+5}{2}, \frac{4+6}{2}) = (\frac{8}{2}, \frac{10}{2}) = (4, 5)$.
Q4
mcq
1 mark
The probability of winning a game is $\frac{3}{4}$. The probability of losing the same game is
-
A.
$\frac{1}{2}$
-
B.
$\frac{3}{4}$
-
C.
$-\frac{1}{4}$
-
D.
$\frac{1}{4}$
Correct Answer: D —
Solution
The sum of the probability of an event occurring, $P(E)$, and the probability of it not occurring, $P(\text{not } E)$, is always 1. Thus, $P(\text{losing}) = 1 - P(\text{winning}) = 1 - \frac{3}{4} = \frac{1}{4}$.
Q5
mcq
1 mark
In triangle $ABC$ if $DE \parallel BC$, then the correct relation among the following is,
-
A.
$\frac{AE}{EC} = \frac{AD}{BD}$
-
B.
$\frac{AD}{AB} = \frac{EC}{BD}$
-
C.
$\frac{AD}{AE} = \frac{CE}{BD}$
-
D.
$\frac{DE}{BC} = \frac{AE}{AD}$
Correct Answer: A —
Solution
According to Thales' Theorem (Basic Proportionality Theorem), if a line is drawn parallel to one side of a triangle intersecting the other two sides, then it divides the two sides in the same ratio. For $DE \parallel BC$, we have $\frac{AD}{BD} = \frac{AE}{EC}$.
Q6
mcq
1 mark
The distance between two parallel tangents in a circle of radius 3 cm is
-
A.
3 cm
-
B.
1.5 cm
-
C.
9 cm
-
D.
6 cm
Q7
mcq
1 mark
The formula to find the volume of a solid cylinder having base radius 'r' and height 'h' is
-
A.
$V = 4 \pi r^2$
-
B.
$V = \pi r^2 h$
-
C.
$V = \pi r l$
-
D.
$V = \frac{1}{3} \pi r^2 h$
Q8
mcq
1 mark
If the $n^{th}$ term of an arithmetic progression is $a_n = 2n + 1$ then its $(n - 1)^{th}$ term is
-
A.
$(2n - 2)$
-
B.
$(2n + 3)$
-
C.
$(2n - 1)$
-
D.
$2n$
Q9
short answer
1 mark
According to Euclid’s division lemma, if $13 = 4 \times 3 + r$, then find the value of 'r'.
Q10
short answer
1 mark
How many solutions do the pair of linear equations $x + 2y - 4 = 0$ and $3x + 2y - 5 = 0$ have ?
Q11
short answer
1 mark
If $x, 7, 10 ...$ are in arithmetic progression then write the value of $x$.
Q12
short answer
1 mark
Find the sum of the zeroes of the polynomial $P(x) = x^2 - 5x + 6$.
Q13
short answer
1 mark
Find the value of the discriminant of the quadratic equation $x^2 - 5x + 1 = 0$.
Q14
short answer
1 mark
Write the formula to find the area of triangle $PQR$ having vertices $P(x_1, y_1)$, $Q(x_2, y_2)$ and $R(x_3, y_3)$.
Q15
short answer
1 mark
In the figure, name the side of triangle $PQR$ which is corresponding to the side $AB$ of triangle $ABC$.
Q16
short answer
1 mark
Write the formula to find the surface area of a sphere having radius 'r' units.
Q17
long answer
2 marks
Prove that $2 + \sqrt{3}$ is an irrational number. OR Show that the rational number $\frac{29}{147}$ has non-terminating decimal expansion without performing long division.
Q18
long answer
2 marks
Find the solution for the given pair of linear equations: $x + y = 10$, $2x - y = 8$
Q19
long answer
2 marks
Find the $21^{st}$ term of the arithmetic progression 5, 9, 13, ..... by using formula.
Q20
long answer
2 marks
Find the roots of the equation $x^2 - 3x + 1 = 0$ using quadratic formula. OR Solve the equation $x^2 - 3x - 10 = 0$ by completing the square method.
Q20
short answer
Find the roots of the equation $x^2 - 3x + 1 = 0$ using quadratic formula.
Q20
short answer
OR Solve the equation $x^2 - 3x - 10 = 0$ by completing the square method.
Q21
long answer
2 marks
In the given figure, find the values of $\cos \alpha$ and $\tan \theta$.
Q22
long answer
2 marks
A box consists of 9 cards which are numbered from 10 to 18. If one card is drawn at random from the box then find the probability of getting a prime number.
Q23
long answer
2 marks
In triangle $ABC$, $\angle ABC = 90^\circ$ and $D$ is the midpoint of $BC$. Prove that $AC^2 = AD^2 + 3CD^2$.
Q24
long answer
2 marks
Construct two tangents to a circle of radius 3 cm from a point 7 cm away from its centre.
Q25
long answer
3 marks
Find the sum of the first 40 positive integers divisible by 6. OR The second and third terms of an arithmetic progression are 14 and 18 respectively. Find the sum of the first 26 terms of the arithmetic progression using the formula.
Q25
long answer
3 marks
Find the sum of the first 40 positive integers divisible by 6.
Q25
long answer
3 marks
OR The second and third terms of an arithmetic progression are 14 and 18 respectively. Find the sum of the first 26 terms of the Arithmetic progression using the formula.
Q26
long answer
3 marks
Divide $P(x) = x^3 - 3x^2 + 5x - 3$ by $g(x) = x^2 - x + 1$, then find the quotient $q(x)$ and remainder $r(x)$.
Q27
long answer
3 marks
Prove that $(\sec A - \cos A)(\cot A + \tan A) = \tan A \cdot \sec A$.
Q27
long answer
3 marks
OR If $A$, $B$ and $C$ are interior angles of a triangle then prove that $1 + \tan^2\left(\frac{B+A}{2}\right) = \text{cosec}^2\left(\frac{C}{2}\right)$.
Q28
long answer
3 marks
The points $A$, $B$ and $C$ are collinear. If $A(1, 0)$, $B(4, 4)$ and $AC = 8$ cm, then find the coordinates of point $C$.
Q29
long answer
3 marks
Calculate the mean for the data in the following frequency distribution table:
[Table provided with class intervals 5-15, 15-25, 25-35, 35-45, 45-55 and frequencies 4, 6, 5, 6, 4]
Q30
long answer
3 marks
The daily income of 50 workers of a factory were recorded as follows. Draw “less than type” ogive for the given data.
[Table provided]
Q31
long answer
3 marks
Prove that “The tangent at any point of a circle is perpendicular to the radius through the point of contact”.
Q32
long answer
3 marks
Construct a triangle with sides 5 cm, 6 cm and 8 cm. Then construct another triangle whose sides are $\frac{3}{4}$ of the corresponding sides of the first triangle.
Q33
long answer
3 marks
The sides of a square touch the circle of radius ‘r’ as shown in the figure. If the area of the shaded region is 42 $\text{cm}^2$ then find the radius of the circle.
Q33
long answer
3 marks
OR In the figure the area of the sector OAB is 231 $\text{cm}^2$ and length of the arc AB is 22 cm. Find the radius of the sector.
Q34
long answer
4 marks
Find the solution of the given pair of linear equations by graphical method:
$x + y = 5$
$2x + y = 6$
Q35
long answer
4 marks
The denominator of a fraction is 3 more than its numerator. If the sum of this fraction and its reciprocal is $\frac{29}{10}$ then find the fraction.
Q35
long answer
4 marks
OR A student bought some books for Rs. 60. Had he bought 5 more books for the same amount each book would have cost him Re. 1 less. Find the number of books bought by him.
Q36
long answer
4 marks
A 1.2 m tall girl spots a balloon moving with the wind in a horizontal line at a height of 88.2 m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°. After some time the angle of elevation reduces to 30° (see the figure). Find the distance travelled by the balloon during the interval.
Q37
long answer
4 marks
Prove that “The ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides”.
Q38
long answer
5 marks
A dustbin in the form of a frustum of a cone is mounted on the circular base of a hollow cylinder as shown in the figure. The radii of circular top and bottom of the dustbin and its slant height are 18 cm, 8 cm and 26 cm respectively. The radius and height of the cylinder are 8 cm and 6 cm respectively. If the total height of the given solid is 30 cm, then find the volume of the dustbin and also the curved surface area of the entire solid.