SSC CHSL Tier 1 Model Paper 1 Answer Key

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Cynthia Fleming
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1 Reasoning Ability 1. Option (b) 2. Option (c) 3. Option (c) 4. Option (d) 5. Option (c) 6. Option (c) 7. Option (b) 8. Option (a) 9. Option (a) 10. Option (a) 11. Option (a) 12. Option (c) 13. Option (d) 14. Option (a) 15. Option (c) 16. Option (d) 17. Option (b) 18. Option (a) 19. Option (a) 20. Option (b) 21. Option (c) 22. Option (d) 23. Option (c) 24. Option (c) 25. Option (c) SSC CHSL Tier 1 Model Paper 1 Answer Key

2 General Awareness 26. Option (b) 27. Option (a) 28. Option (b) 29. Option (c) 30. Option (a) 31. Option (a) 32. Option (b) 33. Option (b) 34. Option (d) 35. Option (d) 36. Option (d) 37. Option (b) 38. Option (b) 39. Option (a) 40. Option (d) 41. Option (b) 42. Option (d) 43. Option (c) 44. Option (b) 45. Option (b) 46. Option (d) 47. Option (d) 48. Option (b) 49. Option (d) 50. Option (d)

3 Quantitative Aptitude 51. Option (a) Solution: L.C.M = = Option (b) Solution: sec 5 5π 4 = x x = sec 225 = sec ( ) = Option (c) Solution: C.P of 5 Articles = Rs Effective C.P of 2 article = Rs. 920 Effective C.P of 3 article = Rs Total C.P after discount = 2180 Effective Discount = 320/ = 12.8% 54. Option (b) Solution: x = tana 2 Let A = 60 x = tan 30 = 1 3 Checking option, option (b) satisfies

4 3 sin cos 60 = = = Option (b) Solution: (1+sin A) x = 2 sec A cos A = 2 sec A sec A tan A = sec A tan A Let A = 30 x = sec 30 tan 30 = = Option (d) Solution: Division A total Marks = = 3840 Division B total Marks = = 2400 Division C total Marks = = 3480 Mean Marks of class A = ( ) = Option (c) Solution: Difference = P ( r 100 ) = P 10000

5 P = Option (b) Solution: Original price = 100 New price = 67 New price must be increased by = x 100 = 49.25% 59. Option (d) Solution: Third proportion 9 24 = 24 x x = 9 = Option (a) Solution: Total Surface area of hemi sphere = 3πr² 3 22 r² = r² = r² = 17.64, r = 4.2 cm 61. Option (b) Solution: area ABC area DEF = (AB DE )2 Perimeter of ABC = ( Perimeter of DEF )2 Perimeter of ABC = 18 Perimeter of DEF 10 = 9 : Option (b)

6 Solution: d 36 d 48 = 3 4d 3d 144 = 3 d = 432 km 63. Option (a) Solution: 13 S.P = 13 C.P + 3 S.P 10 S.P = 13 C.P C.P = 10 S.P 13 Profit % = 3/10 x 100 = 30% 64. Option (c) Solution: 20x + 5y = 3 y = 4x Slope, m₁ 4 Points ( 2, 5) & (6, b) y2 y1 Slop m₂ = x2 x1 = b = b 5 8 m₁ m₂ = 1 4 b 5 8 = -1 b 5 = 2 b = Option (b)

7 Solution: Dodecagon = 12 sides Sum of internal angle = (x 2) 180 = (12 2) 180 = Option (b) Solution: Work done By A in 20 days = 80% = Efficiency of A = 5 x 20 = 1 25 Work done by A + B in 4 days = 1 5 Efficiency of A + B = 1 20 Efficiency of B = = = 100 Whole work done by B in = 100 days 67. Option (b) Solution: πr² = r² 7 = 616 r² = 28 7 r = 2 7 = 14 cm 2πr = x 14

8 = 88 cm 68. Option (a) Solution: 3x x = 19 11x = 3 x = Option (a) Solution: x y = 6, xy = 40 x² + y² = (x y)² + 2xy = = Option (a) Solution: Let number by xy = 10x + y xy = 27 10xy + 54 = 10y + x 54 = 9y 9x y x = 6 y = 6 + x (6 +x)x = 27 x² + 6x 27 = 0 x² + 9x 3x 27 = 0 x(x + 9) 3(x + 9) = 0 (x 3) (x + 9) = 0 x = 3, 9 x = 3 y = 9 Number is 39

9 71. Option (b) Solution: 2x 3 (2x 2) > x 1 < 2 + 2x 2x 6x + 6 > x 1 < 2 + 2x 4x + 6 > x 1 < 2 + 2x (1) 4x + 6 > x 1 5 > 5x x < 1 (2) x 1 < 2 + 2x 3 < x x > 3 3 < x < 1 x can take ( 2) English Language 76. Option (a) 77. Option (b) 78. Option (a) Solution: Use correct compound conjunction As soon as in place of soon as. 79. Option (b) Solution: We are told that its Sole Purpose is the noble goal of creating a functional Public Distribution System, is correct. 80. Option (b) Solution: Lammented Lamented Ordenance Ordinance Synaptick Synaptic Hence Scabbard is the only correctly spelt word. 81. Option (c)

10 Solution: When A question is asked in the Reported Speech. Reporting Verb will change into asked. Reported Speech Past Indefinite Tense change Past Perfect Tense. to 82. Option (c) 83. Option (a) 84. Option (c) Solution: Active: Subject + will/shall + first form of verb + object. Passive: Object of the active sentence + will/shall + be + past participle. 85. Option (d) Solution: Amenable friendly in behavior; easily persuaded or controlled. While Unsusceptible: not like or liable to be influenced or harmed by a particular thing. Hence Amenable and Unsusceptible are antonyms to each other. 86. Option (d) Solution: Subsume: Include or absorb (something) in something else. Incorporate: take in or contain (something) is part of a whole; include. Hence, to incorporate is correct. 87. Option (b) Solution: Prefer take preposition to with itself. Hence option b fits in the context. 88. Option (b) Solution: Look down into means to look around, see or search for, Hence replace Look down into by, Look down on/upon that means to think that something is not good enough for you. 89. Option (a) Solution: Verbs like see, feel, hear, easy, agree, eager etc. take infinitive i.e. (To + V₁) with them. Hence, agree will take to answer with it. Moreover, answer has been used as a verb, here, which means to say, write or do something. Use of any preposition with answer will be superfluous here.

11 Hence, option a fits in the context. 90. Option (c) Solution: To lash (verb): to attack, scold or punish severely with words. To chastise: rebuke or reprimand severely. Hence, To lash and To chastise are Synonyms to each other. 91. Option (c) 92. Option (d) Solution: Exploit: make full use of and derive benefit from (a resource): utilize. Hence, option d fits in the context. 93. Option (c) Solution: To muster (verb): assemble or collect (a number or amount) To estrange: alienate the affections of; to remove to or keep at a distance. Hence To muster and To estrange are antonyms to each other. 94. Option (d) 95. Option (a) Solution: So, increasingly, the poor have been paying to provide revenues for the central government. Hence option A fits in the context. 96. Option (c) Solution: The whole passage is in Present Tense in general sense. Hence has changed is the correct usage. 97. Option (c) Solution: Emergence (Noun): the process of coming into existence or prominence. Hence option c fits in the context. 98. Option (b) Solution: To compare than will be used with bigger. 99. Option (a)

12 Solution: Virtues (Noun): righteousness, a good or admirable quality or property; potency. Hence option A fits in the context Option (d) Solution: Competition out is the right usage.

PRACTICE QUESTION SET ON QUANTITATIVE APTITUDE FOR SSC RECRUITMENT EXAMINATION- 2012

WWW.JAGRANJOSH.COM PRACTICE QUESTION SET ON QUANTITATIVE APTITUDE FOR SSC RECRUITMENT EXAMINATION- 2012 1. Ratio of the principal and the amount after 1 yr is 10 :12. Then the rate of interest per annum