Linear Inequalities MCQs
The length of a rectangle is three times the breadth. If the minimum perimeter of the rectangle is 160 cm, then.
(a) breadth > 20 cm
(b) length < 20 cm
(c) breadth x ≥ 20 cm
(d) length ≤ 20 cm
(c) breadth x ≥ 20 cm
SUBTRACTION
60 - 81 =
-21
If the variance of the data is 121, the standard deviation of the data is:
(a) 121
(b) 11
(c) 12
(d) 21
Answer: (b) 11
What is the sum of 130+125+191?
446
DIVISION
400 ÷ 160 =
2.5
SQUARED AND CUBED
What is 112 ?
121
If – 3x + 17 < – 13, then
x ∈ (10, ∞)
SUBTRACTION
562-114 =
448
The geometric mean of series having mean = 25 and harmonic mean = 16 is:
(a) 16
(b) 20
(c) 25
(d) 30
Answer: (b) 20
If we minus 712 from 1500, how much do we get?
788
DIVISION
what is 1 ÷ 8 in decimal form?
0.125
SQUARED AND CUBED
What is 73 ?
343
Given that x, y and b are real numbers and x < y, b < 0, then
(a) x/b < y/b
(b) x/b ≤ y/b
(c) x/b > y/b
(d) x/b ≥ y/b
(a) x/b < y/b
SUBTRACTION
250-352 =
-102
If sin θ and cos θ are the roots of ax2 – bx + c = 0, then the relation between a, b and c will be.
(a) a2 + b2 + 2ac = 0
(b) a2 – b2 + 2ac = 0
(c) a2 + c2 + 2ab = 0
(d) a2 – b2 – 2ac = 0
Correct option: (b) a2 – b2 + 2ac = 0
110 divided by 10 is:
11
DIVISION
144 ÷ 48
3
SQUARED AND CUBED
52 + 32 + 42 + 62
86
If |x – 7|/(x – 7) ≥ 0, then
(a) x ∈ [7, ∞)
(b) x ∈ (7, ∞)
(c) x ∈ (– ∞, 7)
(d) x ∈ (– ∞, 7]
(b) x ∈ (7, ∞)
SUBTRACTION
2343 - 124 =
2219
What is the total number of sample spaces when a die is thrown 2 times?
A. 6
B. 12
C. 18
D. 36
Answer: D. 36
Solve: 300 – (150×2)
0
DIVISION
-54 ÷ -6 =
9
SQUARED AND CUBED
33 + 53 + 24
168
Solving – 8 ≤ 5x – 3 < 7, we get
(a) –1/2 ≤ x ≤ 2
(b) 1 ≤ x < 2
(c) –1 ≤ x < 2
(d) –1 < x ≤ 2
(c) –1 ≤ x < 2
SUBTRACTION
649 - 349 - 600 - 2 =
-302
If f(x) = x sin x, then f′(π/2) is equal to
(a) 0
(b) 1
(c) –1
(d) 1/2
The product of 121 x 0 x 200 x 25 is
0
DIVISION
93.36 ÷ 6
15.56
SQUARED AND CUBED
What is 83 ?
512