☰
✕
Home
Mock Test
State PCS
Railway
SSC
HSSC
DSSSB
RO/ARO
UPSC
HSSC TGT Maths Date 30/4/2023 Morning Shift
📆 December 12, 2024
Total Questions: 100
51.
If A and B are square matrices of the same order, then (A+B)(A-B) =
(a) A² - B²
(b) A² - B² + BA - AB
(c) A² - BA - AB - B
(d) A² + B² - BA + AB
(e) Unattempted
Correct Answer:
(b) A² - B² + BA - AB
52.
A group consists of 4 girls and 7 boys. The number of ways a team of 5 members can be selected if the team has no girls is:
(a) 42
(b) 35
(c) 21
(d) None of these
(e) Unattempted
Correct Answer:
(c) 21
53.
If |a| and |b|, then (a + b).(a - b) =
(a) Positive
(b) Zero
(c) Negative
(d) None of these
(e) Unattempted
Correct Answer:
(b) Zero
54.
The variance of the first n natural numbers is:
(a) n²-1/12
(b) n²+1/12
(c) n(n²-1)/12
(d) n(n²+1)/12
(e) Unattempted
Correct Answer:
(a) n²-1/12
55.
The perpendicular distance of the point (6, 5, 8) from the y-axis is:
(a) 5 units
(b) 8 units
(c) 6 units
(d) 10 units
(e) Unattempted
Correct Answer:
(d) 10 units
56.
The range of the function f(x) = x² + 2, x ∈ R is:
(a) (2, 0)
(b) (-∞, ∞)
(c) (2, ∞)
(d) None of these
(e) Unattempted
Correct Answer:
(b) (-∞, ∞)
57.
The value of :
(a) 5 π/2
(b) π
(c) 0
(d) 2π
(e) Unattempted
Correct Answer:
(c) 0
58.
lim 1 - cos x / x² =
(a) 1
(b) 1/2
(c) 0
(d) 1
(e) Unattempted
Correct Answer:
(b) 1/2
59.
A card is selected randomly from a pack of 52 cards. The probability that the card is an ace of spades is:
(a) 1/52
(b) 1/2
(c) 1/3
(d) None of these
(e) Unattempted
Correct Answer:
(a) 1/52
60.
The locus represented by xy + yz = 0 is:
(a) A pair of perpendicular lines
(b) A pair of parallel planes
(c) A pair of parallel lines
(d) A pair of perpendicular planes
(e) Unattempted
Correct Answer:
(d) A pair of perpendicular planes
Submit Quiz
« Previous
1
2
3
4
5
6
7
8
9
10
Next »
« Previous Post
Next Post »
Related Posts
Electric current – part (1)
Space Part-3
Computer and Information Technology-part (1)
Optics part (1)
Wave motion
Nuclear physics-part (2)
