Q. The quadratic equation x^2 + 6x + k = 0 has no real roots. What is the condition on k? (2020)
A.
k < 9
B.
k > 9
C.
k = 9
D.
k ≤ 9
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Solution
For no real roots, the discriminant must be less than zero: 6^2 - 4*1*k < 0, which gives k > 9.
Correct Answer:
B
— k > 9
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Q. The quadratic equation x^2 + 6x + k = 0 has roots that are both negative. What is the condition for k? (2020)
A.
k > 9
B.
k < 9
C.
k = 9
D.
k = 0
Show solution
Solution
For both roots to be negative, k must be greater than the square of half the coefficient of x, hence k > 9.
Correct Answer:
A
— k > 9
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Q. The quadratic equation x^2 - 4x + 4 = 0 can be expressed in which of the following forms? (2022)
A.
(x - 2)^2
B.
(x + 2)^2
C.
(x - 4)^2
D.
(x + 4)^2
Show solution
Solution
The equation can be factored as (x - 2)(x - 2) = 0, which is (x - 2)^2.
Correct Answer:
A
— (x - 2)^2
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Q. The quadratic equation x^2 - 6x + 9 = 0 can be expressed as which of the following? (2021)
A.
(x - 3)^2 = 0
B.
(x + 3)^2 = 0
C.
(x - 2)(x - 4) = 0
D.
(x + 2)(x + 4) = 0
Show solution
Solution
The equation can be factored as (x - 3)(x - 3) = 0, or (x - 3)^2 = 0.
Correct Answer:
A
— (x - 3)^2 = 0
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Q. The quadratic equation x^2 - 6x + 9 = 0 can be expressed in the form (x - a)^2 = 0. What is the value of a? (2021)
Show solution
Solution
The equation can be factored as (x - 3)^2 = 0, hence a = 3.
Correct Answer:
A
— 3
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Q. The radius of a circle is increased by 50%. What is the percentage increase in the area of the circle? (2020)
A.
50%
B.
75%
C.
100%
D.
125%
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Solution
If r is the original radius, new radius = 1.5r. Area increases from πr² to π(1.5r)² = 2.25πr². Percentage increase = (2.25 - 1) × 100% = 125%.
Correct Answer:
C
— 100%
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Q. The Rajya Sabha has a total of 245 members. If 12 members are nominated, what is the maximum number of elected members?
A.
233
B.
245
C.
233
D.
240
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Solution
Maximum elected members = 245 - 12 = 233
Correct Answer:
A
— 233
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Q. The Rajya Sabha has a total of 250 members. If 12 members are nominated, what percentage of the total members are elected?
A.
80%
B.
85%
C.
90%
D.
88%
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Solution
Elected members = 250 - 12 = 238. Percentage = (238/250) * 100 = 95.2%.
Correct Answer:
C
— 90%
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Q. The ratio of the ages of A and B is 3:4. If A is 12 years old, how old is B? (2022)
A.
16 years
B.
18 years
C.
20 years
D.
24 years
Show solution
Solution
If A's age is 12, then B's age = (4/3) * 12 = 16 years.
Correct Answer:
A
— 16 years
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Q. The ratio of the ages of A and B is 4:5. If A is 20 years old, how old is B? (2019)
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Solution
Let the age of B be 5x. Since A's age is 4x = 20, x = 5. Therefore, B's age = 5 * 5 = 25.
Correct Answer:
A
— 25
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Q. The ratio of the ages of A and B is 4:5. If A is 20 years old, what is B's age? (2019)
Show solution
Solution
Let B's age be 5x. Since A's age is 4x = 20, x = 5. Therefore, B's age = 5 * 5 = 25.
Correct Answer:
A
— 25
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Q. The ratio of the ages of two friends is 3:4. If the sum of their ages is 56 years, what is the age of the older friend? (2019)
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Solution
Let the ages be 3x and 4x. Then, 3x + 4x = 56 => 7x = 56 => x = 8. Older friend's age = 4x = 32.
Correct Answer:
A
— 32
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Q. The Right against Exploitation includes which of the following? (2023)
A.
Prohibition of human trafficking
B.
Prohibition of forced labor
C.
Prohibition of child labor
D.
All of the above
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Solution
The Right against Exploitation includes all these prohibitions as per Articles 23 and 24.
Correct Answer:
D
— All of the above
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Q. The Right to Constitutional Remedies is enshrined in which article? (2020)
A.
Article 32
B.
Article 21
C.
Article 19
D.
Article 14
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Solution
The Right to Constitutional Remedies is enshrined in Article 32.
Correct Answer:
A
— Article 32
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Q. The right to constitutional remedies is provided under which article?
A.
Article 32
B.
Article 21
C.
Article 19
D.
Article 14
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Solution
Article 32 of the Indian Constitution provides the right to constitutional remedies, allowing individuals to approach the Supreme Court for enforcement of their Fundamental Rights.
Correct Answer:
A
— Article 32
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Q. The Right to Education is a Fundamental Right under which Article?
A.
Article 21A
B.
Article 19
C.
Article 45
D.
Article 30
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Solution
The Right to Education is a Fundamental Right under Article 21A, which mandates free and compulsory education for children aged 6 to 14.
Correct Answer:
A
— Article 21A
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Q. The Right to Education was made a Fundamental Right under which Article?
A.
Article 21A
B.
Article 19
C.
Article 45
D.
Article 30
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Solution
The Right to Education was made a Fundamental Right under Article 21A of the Constitution.
Correct Answer:
A
— Article 21A
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Q. The Right to Freedom of Religion is guaranteed under which Article? (2021)
A.
Article 25
B.
Article 26
C.
Article 27
D.
All of the above
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Solution
Articles 25, 26, and 27 collectively guarantee the Right to Freedom of Religion.
Correct Answer:
D
— All of the above
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Q. The Right to Freedom of Speech and Expression is enshrined in which article?
A.
Article 19(1)(a)
B.
Article 21
C.
Article 14
D.
Article 32
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Solution
The Right to Freedom of Speech and Expression is guaranteed under Article 19(1)(a) of the Indian Constitution.
Correct Answer:
A
— Article 19(1)(a)
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Q. The Right to Life and Personal Liberty is guaranteed under which Article?
A.
Article 19
B.
Article 20
C.
Article 21
D.
Article 22
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Solution
The Right to Life and Personal Liberty is guaranteed under Article 21 of the Indian Constitution.
Correct Answer:
C
— Article 21
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Q. The right to privacy was recognized as a Fundamental Right under which article? (2017)
A.
Article 21
B.
Article 19
C.
Article 14
D.
Article 32
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Solution
The Supreme Court of India recognized the right to privacy as a Fundamental Right under Article 21 in the landmark judgment of Justice K.S. Puttaswamy v. Union of India in 2017.
Correct Answer:
A
— Article 21
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Q. The roots of the equation 4x^2 - 12x + 9 = 0 are: (2019)
A.
1 and 2
B.
3 and 3
C.
0 and 3
D.
2 and 1
Show solution
Solution
The equation can be factored as (2x - 3)(2x - 3) = 0, hence the roots are 3 and 3.
Correct Answer:
B
— 3 and 3
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Q. The roots of the equation x^2 + 2x + k = 0 are -1 and -3. What is the value of k?
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Solution
The sum of the roots is -1 + (-3) = -4, so -2 = -4, which is correct. The product of the roots is (-1)(-3) = 3, so k = 3.
Correct Answer:
B
— 3
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Q. The roots of the equation x^2 + 3x + k = 0 are -1 and -2. What is the value of k? (2021)
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Solution
The sum of the roots is -1 + (-2) = -3, and the product is (-1)(-2) = 2. Thus, k = 2.
Correct Answer:
A
— 2
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Q. The roots of the equation x^2 + 4x + k = 0 are equal. What is the value of k?
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Solution
For the roots to be equal, the discriminant must be zero. Thus, 4^2 - 4*1*k = 0 => 16 - 4k = 0 => k = 4.
Correct Answer:
B
— 8
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Q. The roots of the equation x^2 - 10x + 21 = 0 are: (2020)
A.
3 and 7
B.
4 and 6
C.
5 and 5
D.
2 and 8
Show solution
Solution
Factoring gives (x - 3)(x - 7) = 0, so the roots are 3 and 7.
Correct Answer:
A
— 3 and 7
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Q. The roots of the equation x^2 - 2x + k = 0 are real and distinct if k is:
A.
< 1
B.
≥ 1
C.
≤ 1
D.
> 1
Show solution
Solution
The discriminant must be greater than zero: (-2)^2 - 4*1*k > 0, which simplifies to k < 1.
Correct Answer:
A
— < 1
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Q. The roots of the equation x^2 - 5x + k = 0 are equal. What is the value of k? (2020)
Show solution
Solution
For the roots to be equal, the discriminant must be zero. Thus, (-5)^2 - 4*1*k = 0 leads to 25 - 4k = 0, giving k = 6.25.
Correct Answer:
A
— 6.25
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Q. The roots of the quadratic equation x^2 - 4x + k = 0 are 2 and 2. What is the value of k? (2022)
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Solution
If the roots are both 2, then k = 2^2 - 4*2 = 4 - 8 = -4. Thus, k = 4.
Correct Answer:
C
— 4
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Q. The scalar product of two unit vectors is 0. What can be inferred about these vectors?
A.
They are parallel
B.
They are orthogonal
C.
They are collinear
D.
They are equal
Show solution
Solution
If the scalar product is 0, the vectors are orthogonal.
Correct Answer:
B
— They are orthogonal
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