GRE प्रश्न और उत्तर का अभ्यास करें

प्र: The angles of a quadrilateral are in the ratio of 2:4:7:5. The smallest angle of the quadrilateral is equal to the smallest angle of a triangle. One of the angles of the triangle is twice the smallest angle of the triangle. What is the second largest angle of the triangle ? 2359 0

  • 1
    80 degrees
    सही
    गलत
  • 2
    60 degrees
    सही
    गलत
  • 3
    120 degrees
    सही
    गलत
  • 4
    40 degrees
    सही
    गलत
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उत्तर : 2. "60 degrees"
व्याख्या :

Answer: B) 60 degrees Explanation: Given the angles of a quadrilateral are in the ratio of 2:4:7:5Let the angles of a quadrilateral are 2x, 4x, 7x, 5xBut we know that sum of the angles = 360 degrees.=> 2x + 4x + 7x + 5x = 360=> x = 20Therfore, the smallest angle of the quadrilateral = 2x = 2x20 = 40 degrees.One of the angle of the triangle = 2 x 40 = 80 degreesThe other angle is 180 - (40 + 80) = 60 degrees. Hence the second largest angle of the triangle is 60 degrees.

प्र: One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture. 2357 0

  • 1
    27 %
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  • 2
    26 %
    सही
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  • 3
    29 %
    सही
    गलत
  • 4
    21 %
    सही
    गलत
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उत्तर : 1. "27 %"
व्याख्या :

Answer: A) 27 % Explanation: Let the percentage of benzene = X(30 - X)/(X- 25) = 6/4 = 3/2 => 5X = 135  X = 27 So, required percentage of benzene = 27 %

प्र: Detect an error part labelled (1), (2), (3) & (4) in the following question. whole northern states in(1)/india are reeling under the(2)/devastating(3)/of the drought(4) 2353 0

  • 1
    1
    सही
    गलत
  • 2
    2
    सही
    गलत
  • 3
    3
    सही
    गलत
  • 4
    4
    सही
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उत्तर : 1. "1"
व्याख्या :

Answer: A) 1 Explanation: Error is in the first part of the sentence. 'Whole' is used with singular nouns.The correct sentence is - 'All Northern states in India are reeling under the devastating of the drought.

प्र: A person says that his son is 5 times as old as his daughter and his wife is 5 times older than his son and he is twice the age of his wife . The sum total of all the ages equals the age of the grand mother who celebrated her 81st birthday today. How old was his son? 2353 0

  • 1
    50 yrs
    सही
    गलत
  • 2
    25 yrs
    सही
    गलत
  • 3
    72 yrs
    सही
    गलत
  • 4
    40 yrs
    सही
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उत्तर : 1. "50 yrs"
व्याख्या :

Answer: A) 50 yrs Explanation: Let the daughter age be 'x'Therefore, Son age = 5x, Mother age = 25x, Person age = 50x. Thus we get, x+5x+25x+50x = 8181x = 81x = 1 Daughter's age = 1, Son's = 5, Mother's = 25, Person's age = 50.

प्र: Ravi and Ramu are partners in a business.Ravi contributes 1/6 of the capital for 16 months and Ramu received 2/3 of the profit. For how long Ramu's money was used ? 2352 0

  • 1
    11 months
    सही
    गलत
  • 2
    10 months
    सही
    गलत
  • 3
    9 months
    सही
    गलत
  • 4
    8 months
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उत्तर : 4. "8 months"
व्याख्या :

Answer: D) 8 months Explanation: Let the total Profit be Z.Ramu's profit share is 2/3 of profit (i.e 2Z/3)Ravi's profit is (Z-2Z/3) =Z/3Hence the profit ratio is , Ravi : Ramu = Z/3 : 2Z/3 = 1:2 Let total Capital be Rs.X and Ramu has contributed for Y months.Since Ramu's profit share is 2/3, his invest share will be 2/3 in capital. Ravi's invest for 16 months / Ramu's invest for Y months = Ravi's profit share / Ramu's profit sharei.e. (X/6 x 16) / (2X/3 x Y) = 1/2 Solving the above equation, we get Y = 8.So Ramu's money has been used for 8 months.

प्र: The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned  ? 2344 0

  • 1
    Rs. 11828.80
    सही
    गलत
  • 2
    Rs. 19828.80
    सही
    गलत
  • 3
    Rs. 9828.80
    सही
    गलत
  • 4
    Rs. 19328.80
    सही
    गलत
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उत्तर : 2. "Rs. 19828.80"
व्याख्या :

Answer: B) Rs. 19828.80 Explanation: Let the sum be Rs. P P{ 1+81002- 1 } = 2828.80   It is in the form of  a2-b2 = a+ba-b   P(8/100)(2 + 8/100) = 2828.80   P = 2828.80 / (0.08)(2.08)   = 1360/0.08 = 17000   Principal + Interest = Rs. 19828.80

प्र: Find out the wrong number in the following series ? 2880, 480, 92, 24, 8, 4, 4 2343 0

  • 1
    480
    सही
    गलत
  • 2
    92
    सही
    गलत
  • 3
    24
    सही
    गलत
  • 4
    4
    सही
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उत्तर : 2. "92"
व्याख्या :

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.

प्र: 'BE' is related to 'GJ' in the same way as 'PS' is related to ? 2340 0

  • 1
    VX
    सही
    गलत
  • 2
    TU
    सही
    गलत
  • 3
    UX
    सही
    गलत
  • 4
    TV
    सही
    गलत
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उत्तर : 3. "UX"
व्याख्या :

Answer: C) UX Explanation: Each corresponding letter moves five places forward in the alphabet.Here as BE is related to GJ then PS will relate to UX.

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