Q41. If the angles of a triangle are in the ratio 3: 4: 5, then the value of greatest angle in radians is:
A 5 12 π
B 2/π
C 2 3 π
D 3/π
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Correct answer: 5 12 π
Q42. The difference of squares of the length and breadth of a rectangle is 180. The square of the length is 8 times the breadth. The measure of the breadth is:
A 14
B 18
C 10
D 12
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Correct answer: 18
Q43. The largest side of a triangle is three times the shortest side and third side is 4 cm longer than the shortest side. If the perimeter of the triangle is more than 49 cm, then the minimum length of the shortest side is:
A 11
B 9
C mote than 9
D more than 10
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Correct answer: mote than 9
Q44. If the side of a square changes from 3 m to 2.9 m, the approximate change in its area (in m2) is
A 0.1
B 0.6
C 0.4
D 0.8
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Correct answer: 0.6
Q45. For a sphere, the rate of change of volume is:
A π times the rate of change of radius
B Surface area times the rate of change of diameter
C Surface area times the rate of change of radius
D 2π times the rate of change of radius
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Correct answer: Surface area times the rate of change of radius
Q46. If n is an odd positive integer, then an +bn is divisible by:
A a2/+b2
B a−b
C a+b
D 2a+b
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Correct answer: a+b
Q47. 102n–1 +1∈N, is divisible by:
A 9
B 10
C 8
D 11
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Correct answer: 11
Q48. The number of divisors and sum of divisors of the number 1800 are:
A 24, 2820
B 36, 6045
C 30, 2015
D 36, 3015
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Correct answer: 36, 6045
Q49. The value of n i j i 1 j 1 k 1 1 = ∑ ∑ ∑ is:
A 2 n ∑
B n/∑
C 3 n ∑
D ()() n n 1 n 2 6 + +
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Correct answer: ()() n n 1 n 2 6 + +
Q50. If the volume of a sphere is 8 times that of another sphere, then the ratio of their surface areas is:
A 1: 4
B 4: 1
C 2: 1
D 3: 1
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Correct answer: 4: 1
Q51. A cuboid shaped slab of iron whose dimensions are 55 cm × 40 cm × 15 cm, is melted and recast into a pipe. If the outer diameter and thickness of the pipe is 8 cm and 1 cm, respectively, then the length of the pipe is:
A 10 m
B 15 m
C 25 m
D 20 m
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Correct answer: 15 m
Q52. The area of the circle is 220 cm2, then the area of the square inscribed in it is:
A 49 cm2
B 150 cm2
C 70 cm2
D 140 cm2
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Correct answer: 140 cm2
Q53. Which of the following inequality is equivalent to a c 3b − < for all non-zero values of a, b and c?
A a bc 3 − <
B a > –3bc
C a < –3b
D a 3c b > −
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Correct answer: a 3c b > −
Q54. If A (6, 3), B(3, 5)C(4, 2), P (α, β), then the ratio of the areas of the triangles PBC, ABC are:
A 2:7 α +β +
B :7 α +β
C 3 14: 7 α +β −
D –:7 α β
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Correct answer: 3 14: 7 α +β −
Q55. The statement a = bq + r where 0 ≤ r ≤ b is:
A Peono’s theorem
B Euclid’s division lemma
C Fermat theorem
D The fundamental theorem
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Correct answer: Euclid’s division lemma
Q56. A student wrote exams on six question papers of maximum marks 100 each, one on English, two on Mathematics and three on Science. He got 95% in English, 90% in Mathematics and 80% in Science. What is her approximate overall percentage?
A 83.5%
B 88.3%
C 85.8%
D 84.9%
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Correct answer: 85.8%
Q57. If the sides of triangle are a = 3 cm, b = 4 cm, c = 5 cm, then its area is:
A 8 cm2
B 9 cm2
C 6 cm2
D 12 cm2
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Correct answer: 6 cm2
Q58. The greatest common divisor of (6, 35) is:
A 35
B 5
C 6
D 1
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Correct answer: 1
Q59. The area of the triangle formed by the points (0, 0); () () 2 x 6x a,0, 0, a is 5 1 2a units2 then x = _______.
A 1 or –5
B –1 or 5
C –1 or –5
D 1 or 5
Show answer
Correct answer: –1 or –5
Q60. The sides of a rectangle are 49 m and 35 m, respectively. How many square beds can be accommodated in this rectangle if the side of the bed is 7 m?
A 35
B 36
C 33
D 34
Show answer
Correct answer: 35