GATE Practice Question and Answer

Q: By investing Rs. 1620 in 8% stock, Michael earns Rs. 135. The stock is then quoted at ? 1302 0

  • 1
    Rs. 145
    Correct
    Wrong
  • 2
    Rs. 245.1
    Correct
    Wrong
  • 3
    Rs. 96
    Correct
    Wrong
  • 4
    Rs. 75
    Correct
    Wrong
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Answer : 3. "Rs. 96"
Explanation :

Answer: C) Rs. 96 Explanation: Michel earns Rs. 135 by investing Rs. 1620To earn Rs. 8 how much he have to invest...? = (8 x 1620)/135 = Rs. 96

Q: If 6 engines consume 24 metric tonnes of coal, when each is working 8 hours day, how much coal will be required for 9 engines, each running 13hours a day, it being given that 2 engines of former type consume as much as 3 engines of latter type ? 2925 0

  • 1
    45 metric tonnes
    Correct
    Wrong
  • 2
    47 metric tonnes
    Correct
    Wrong
  • 3
    55 metric tonnes
    Correct
    Wrong
  • 4
    34 metric tonnes
    Correct
    Wrong
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Answer : 1. "45 metric tonnes"
Explanation :

Answer: A) 45 metric tonnes Explanation: 2 engines of former type for one hour consumes (2 x 24)/(6 x8) = 1 metric ton  i.e. 3 engines of latter type consumes 1 ton for one hour Hence 9 engines consumes 3 tons for one hour For 15 hours it is 15 x 3 = 45 metric tonnes.

Q: Find out the wrong number in the following series ? 2880, 480, 92, 24, 8, 4, 4 1623 0

  • 1
    480
    Correct
    Wrong
  • 2
    92
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    4
    Correct
    Wrong
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Answer : 2. "92"
Explanation :

Answer: B) 92 Explanation: The given series of numbers follow the rule that, 2880/6 = 480480/5   = 9696/4     = 2424/3     = 88/2       = 44/1       = 4 But 92 is not in the rule. It is the wrong number in the given series.

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Answer : 2. "2014"
Explanation :

Answer: B) 2014 Explanation: If After p years , commodity X will cost 60 rupees more than the commodity Y, then 320 + 60p = 740 + 20p + 60=> p = 12 So in year (2002 + 12 = 2014), commodity X will cost Rs.60 more than the commodity Y.

Q: A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions made by the larger wheel is ? 1509 0

  • 1
    11
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    13
    Correct
    Wrong
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Answer : 3. "9"
Explanation :

Answer: C) 9 Explanation: Here the number of cogs is inveresly proportional to number of revolutions => More cogs less revolution=> 6 : 14 :: x : 21=> (21x6)/14 = 9

Q: The marked price of a Watch is Rs.8400. It is to be sold at Rs.6896 at two successive discounts. If the first discount is 12%, the second discount is ? 1479 0

  • 1
    7.2 %
    Correct
    Wrong
  • 2
    9.14 %
    Correct
    Wrong
  • 3
    7.13 %
    Correct
    Wrong
  • 4
    6.709 %
    Correct
    Wrong
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Answer : 4. "6.709 %"
Explanation :

Answer: D) 6.709 % Explanation: (100-x)%  of 88% of 8400 = 6896   => 100-x10088100x8400 = 6896 => x = 6.709%

Q: A woman says, "If you reverse my own age, the figures represent my husband's age. He is, of course, senior to me and the difference between our ages is one-eleventh of their sum." The woman's husband age is ? 2564 0

  • 1
    45
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    42
    Correct
    Wrong
  • 4
    54
    Correct
    Wrong
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Answer : 4. "54"
Explanation :

Answer: D) 54 Explanation: By trial and error method from the given options, as 54 - 45 =  (1/11) x (45+54)  = 99/11  = 9 Hence this satisfies the given conditions. Then the woman's husband age is 54.

Q: In these series, you will be looking at both the letter pattern and the number pattern. Fill the blank in the middle of the series or end of the series.SCD, TEF, UGH, ____, WKL 2710 0

  • 1
    UJI
    Correct
    Wrong
  • 2
    VIJ
    Correct
    Wrong
  • 3
    XLM
    Correct
    Wrong
  • 4
    DOP
    Correct
    Wrong
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Answer : 2. "VIJ"
Explanation :

Answer: B) VIJ Explanation: First letter series S,T,U,Vsecond and third letter series CD,EF,GH,IJ...so answer = VIJ

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