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Competitive

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Published in: CAT Exam
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SSC-CGL

Aritra D / Kolkata

20 years of teaching experience

Qualification: M.A (Rabindra Bharati University - [RBU], Kolkata - 2005)

Teaches: English, Mathematics, Physics, BA Tuition, LIC, NDA, SSB Exam, SSC Exams, NET, SET, TET, UGC Net

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  1. Clue: Multiply the digits of the first three boxes and then add the digit of the fourth box. In Row In Row In Row In Row 4: 12 = 84 Hence, the correct option is (C). SSC-CGL Tier 1 (2015) In question nos. 1 to 4 select the missing number from the given responses: B) 94 C) 84 1. nannn aønæn A) 60 LC) 84 B) 27 D) 120 2 4 32 A) 200 C) 30 3 5 50 8 10 12 D) 92 D) 128 Clue: In every column, multiply the middle number with the sum of the top and the bottom numbers. In Column 1: (2 + 4) = 6 And In Column 2: (3 + 7) = 10 And 10 x 5 = 50 In Column 3: (8 + 12) = 20 And 20 x 10 = 200 Hence, the correct option is (A). 3. A) 12 11 78 9 6 104 14 10 7 8 D) 74
  2. Clue: Subtract the product of the bottom two quadrants from the product of the top two quadrants. In Circle 1: Product of top two quadrants = 11 x 12 = 132 And product of bottom two quadrants = 6 x 9 = 54 The number in the inner circle = 132 — 54 = 78 In Circle 2: Product of top two quadrants = 14 x 10 = 140 And product of bottom two quadrants = 7 x 8 = 56 The number in the inner circle = 140 — 56 = 84 Hence, the correct option is (C). 4. 1 216 343 8 125 512 35 401 1575 A) 340 C) 575 B) 729 D) 615, Clue 1: This is a series of cubes of natural numbers. In column 1, the series descends from the cell 1 to the cell 3, then moves to column 2 where it ascends from cell 3 to cell 1 and again it moves to column 3 where it descends from cell 1 to cell 3. The last row is meant to confuse. 13 63 73 23 53 83 33 43 93 The missing number is 93 = 729 Hence, the correct option is (B). In question 5 and 6, a statement is followed by two conclusions. Choose the correct conclusion. 5. The be cr-icica' the ra iras — 20-1 the rai 11 11
  3. Clue: The statement means that the condition of crops was critical before the rains and was expected to improve after the rains. But, as the condition has not improved even after the rains so logically, the correct option is (D). l. Some Politicians are social workers. 2. All Doctors are social ssorkers. Conclusions / I. Some Doctors are Politicians Il. Some Social workers are Doctors as •svell as Politicians A) C) Both conclusions I and Il follow. 1 d2.tT I I Neither conclusion I nor Il follow. B) D) Only conclusion Il follow. Only conclusion I follow. Clue: From Statements 1 and 2, it is clear that social workers comprise of politicians and doctors. It is however, wrong to think that doctors are politicians too. The relationship can be best understood by the following Venn Diagram: OCIAL WORKERS Politic ns Hence, the correct option is (B). octors
  4. 7. Introducing a a said lis rnothcr is the only daughter of father" is the ruan related to the Son C) Brother / a-TTS B) Father / D) Uncle / Clue: The man's maternal grandfather is the woman's father. So the man is the son of the woman. Hence the correct option is (A). Find the nurnbcr that is cornrnon tor an or crue-s gevcn 8. æo-f*r Virgo b) Vol leyball c) A highest scoring shot of a particular sport / d) Extra sensory perceptions Clue: Virgo is the sixth astrological sign; a volleyball team consists of six players; the highest scoring shot in cricket is six; and the extra sensory perception is called the sixth sense. Hence, the correct option is (D). 9. S) In a certain coding systetn APPLE stands for ETTPI. What is the code for APPLE ETTPI -DELHI• A) CQMND HIPLM B) ZAHDE D) CQPL?vS Clue: In the words APPLE and ETTPI, there are three letters between A and E (B, C, D), P and T (Q, R, S), Land P (M, N, O), and E and I (F, G, H). so, the code for DELHI will be D (E, F, G) H, E (F, G, H) l, L (M, N, O) P, H (l, J, K) L, I (J, K, L) M = HIPLM. Hence, the correct option is (C). 10. A) 12 -12
  5. Clue: Top left-quadrant x top right quadrant x bottom right quadrant = quadrant Circle Circle 2: 2 = 30 Circle 3: 5 x 1 x 1) Circle 4: x (— 1) =— 12. Hence, the correct option is (C). ) Which of the following particles has the dual nature of 11. panicle- wave ? bottom left A) Neutron B) Electron / Clue: The wave-particle duality of electrons was proposed by Louis de Broglie and experimentally proved by Davisson and Germer. Hence, the correct option is (B). 12. business for ics and The correct option is (B). 13. The correct option is (D). Bank for t ture and for air and road transport El igib'e -v«yte fic i idates 14. The treatment of muddy water with alum in the purification process is known as: (A) absorption (B) adsorption (C) coagulation (D) emulsification
  6. The correct option is (C). 7) Cost price of 100 books is equal to the selling price Of 60 15. books. The gain or loss percentage will be: 100 60 A) 66_2_ % 3 B) 66 1 0/0 4 D) 66 0/0 4 Clue: Let the cost price of 100 books be Rs x. 60x 3x Therefore, the cost price of 60 books = Rs — = Rs — 100 5 And selling price of 60 books = Rs x 3x Since, x > — so profit has been made. 5' Thus, Profit = Rs (x 5 5 Profit And profit % = x 100 CP 5 — x 100 5 200 = 66-0/0 3 3 Hence, the correct option is (A). 7) If/ p 99 then the value of/ at F- 16. pc p2 + 3p 3 ) A) 999999 989898 Clue: Given, p = 99 = 1 Thus, p(p2 + 3p + 3) = (100 - - + 3(100 - 1) + 3] = 1-200 + 300-3 + 3] B) s OSSS99 D) 998889 = 99[10000 + 101] = 99[10101] = 999999 So, the correct option is (A). 17. (p O) then is equal to 2 Clue: Given sec 0+ tan 0 = p Thus, sec 0 = p — tan 0 Or, sec20 = (p — tan Or, 1 + tan20 = p2 + tan20 — 2P tan 9 Or, 2P tan p2—1
  7. Or, tan So, sec 0 = p 2 p 2 —p 2+1 Hence, the correct option is (B). For question 18, 19 and 20, check whether the underlined portions require any improvement or not. 18. He does not laugh, nor he smiles. (A) nor he does smile (D) nor does he smile. The correct option is (D). (B) no improvement 19. If I will get an opportunity, I shall attend the seminar. (A) get (B) No improvement The correct option is (A). (C) shall get (C) neither he does smile (D) got. 20. The others shook their heads and made vague noises of approval. (A) nodded (B) no improvement The correct option is (A). (C) turned around (D) hung. For questions 21 and 22, choose the correct alternatives for the underlined phrases and idioms. 21. Amit said to Rekha, 'Don't make a mountain of a molehill'. (A) attempt an impossible task (C) create problems The correct option is (D). (B) start looking for molehills in mountains (D) exaggerate a minor problem 22. His friend turned out to be a snake in the grass. (A) cowardly and brutal (B) low and mean (C) a hidden enemy and deceitful person. The correct option is (C). (D) an unreliable In questions 23 and 24, find out the parts of the sentences that have errors. 23. Riches are uncertain things and the fame that power give or is won by foul means is as short-lived as the dewdrop. (A) No error (B) Riches are uncertain things and the fame (C) is as short-lived as the (D) that power give or is won by foul means. dewdrop Instead of 'power give', it should be 'power gives'. Hence, the correct answer is (D).
  8. 24. Some members of the committee were opposed to the use of the club members' money to redecorate the meeting hall. (A) no error (B) were opposed to (C) the club members' money to redecorate the meeting hall (D) some members of the committee. Instead of 'to redecorate the meeting hall', it should be 'in redecorating the meeting hall'. So the correct option is (C). Change to appropriate passive forms. 25. Ratan is performing an experiment. (A) Experiments are performed by Ratan. (B) An experiment is being performed by Ratan. (C) An experiment is performed by Ratan. (D) An experiment was performed by Ratan. The correct option is (B). 26. Who had laughed at you? (A) By whom were you laughed at? (B) By whom had you been laughed at? (C) By whom you had been laughed at? (D) Who had you been laughed at? The correct option is (A). Change into Direct/lndirect Speech. 27. The boy thanked the Principal for granting him a fee concession. (A) The boy said to the Principal, "l express my thanks that you have granted me a fee- concession." (B) The boy said to the Principal, "l am thankful to you for a fee-concession." (C) The boy said to the Principal, "Thank you, madam for granting me a fee-concession." (D) The boy told the Principal, "You are kind enough to grant me a fee-concession." The correct option is (C). 28. The guide said to the swimmer, "Don't swim out too far." (A) The guide told the swimmer to not swim out too far. (B) The guide asked the swimmer not swim out too far. (C) The guide suggested the swimmer that don't swim out too far. (D) The guide forbade the swimmer to swim out too far. The correct option is (D). Choose the correct one word for each of the following questions. 29. A statement in which something is repeated twice in different words. (A) repetition (B) tautology (C) tarragon (D) temerity Repetition means merely repeating something. Tautology means repeating a statement in a different way unnecessarily. Tarragon is a small European herb that is used for flavouring food.
  9. Temerity means being foolishly confident in the face of danger. The correct option is (B). 30. A person who is extremely desirous of money. (A) extravagant (B) miser (C) avaricious Extravagant is a person who spends a lot unnecessarily. Miser is a person who does not like to spend money. Avaricious is a person who is greedy for money. Fervent means a person who is passionate about anything. (D) fervent So the correct option is (C). 31. To destroy completely. (A) chide (B) dawdle (C) bluster Chide means to scold gently. Dawdle means to move or act too slowly. (D) annihilate Bluster means to speak in a loud and aggressive manner. Annihilate means to destroy completely. So the correct option is (D). 32. A person who has had one or more limbs removed. (A) handicap (B) fatalist (C) limber (D) amputee Handicap means a disadvantage. Fatalist means a belief in fate or destiny. A limber is a type of weapon in which a canon is attached to a two-wheeled vehicle. An amputee is a person who has one or more limbs removed through surgery. Thus, the correct option is (D).
  10. NDA piece •0-E _pa-pe•-r -piece af pa e. I—re s The buoyant force on the piece of paper is more because of the larger surface area of the paper. So, the correct option is (B). 2. 13 ge by -the by e The correct option is (C). 3. 'The plot giver* .abosre displacer-ne of particle *'ith tin-.e The is g v-elc•city— The correct option is (A). 4. A bullet of mass 20 g is fired in the horizontal direction with a velocity of 150 m/s from a pistol of mass 1 kg. The recoil velocity of the pistol is (A) 3 m/s (B) 3 km/s (C) 300 m/s (D) - m/s Clue: Given, mass of pistol M = 1 kg = 1000 g Mass of bullet m = 20 g Velocity of bullet v = 150 m/s Let the recoil velocity of the pistol V be x m/s
  11. Thus, MV = rnv or, 1000x = 20 x 150 or, Thus, V = 3 m/s Hence, the correct option is (A). 5. i—rx g a -i_l Yx_i The correct option is (A). 6. An electric heater is rated 1500 watts. If electric power costs Rs 2 per kilowatt-hour, find the cost of power to run the heater for 10 hours. (A) Rs 30 (B) Rs 15 (C) Rs 150 (D) Rs 25 Clue: Given, rating of heater = 1500 watts = 1.5 kilowatt Time = 10 hrs. Rate of power = Rs 2 per kilowatt-hour Thus, cost of power = wattage x rate x time = 10 = 30 Thus, the correct option is (A). 7. The ceilings of a concert hall are generally curved (A) because they reflect the sound to the audience (B) because they can absorb noise (C) to have better aeration in the hall (D) as any sound from outside cannot pass through the curved ceiling. The correct option is (A). 8. Even at night, bats can know about their prey at a distance by emitting (A) infra-red lights (B) ultraviolet lights ultrasonic sounds. The correct option is (D). (C) chemicals from their bodies (D) 9. Rays of light get refracted from air to glass because (A) density of glass is higher than that of air (B) they cannot be reflected from a glass surface (C) glass absorbs energy from the light rays (D) velocity of light in glass is less than the velocity of light in air Clue: according to the wave-theory of light, its velocity is less in a denser medium than a lighter medium. As glass is denser than air, so the velocity of light is lesser in glass than in air. Hence, the correct option is (D).
  12. 10. White light, while passing through a glass prism, breaks up into light of different colours because (A) refractive index of glass for different colours of light is different (B) glass prism absorbs white light and emits light of several colours in different directions (C) of total internal reflection of white light on the surfaces of the prism (D) of the interference of different colours inside the prism. The correct option is (A). 11. When long dry hair is brushed, the strands often move away from each other because while brushing (A) air is being blown through the strands (B) static electric charges are being induced on the hair (C) mechanical energy is being transferred into heat energy (D) the gravitational attraction among the strands becomes smaller The correct option is (B). 12. Chromium oxide is used as an ingredient in paints to obtain (A) green colour (B) blue colour (C) red colour The correct option is (A). (D) violet colour 13. A mixture of sodium chloride and naphthalene can be separated by (A) extraction with hot water (B) extraction with cold water (C) sublimation (D) steam distillation Clue: as naphthalene evaporates on heating, it can be separated from most mixtures by sublimation. Thus, the correct answer is (C). 14. Which gas is evolved when Zn metal is placed in dilute sulphuric acid? (A) hydrogen (B) oxygen (C) water vapour (D) sulphur dioxide Clue: Zn + H2S04 = ZnS04 + Hence, the correct option is (A). 15. Biogas consists mainly of (A) methane The correct answer is (A). 16. Metalloids are (A) alloys of alkali metals and other metals (B) colloids of metals (B) ethane (C) butane (D) carbon dioxide (C) elements having some properties of both metals and non-metals (D) metals heavier than lead. The correct option is (C).

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