Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: Today is Varun's birthday. One year, from today he will be twice as old as he was 12 years ago. How old is Varun today ? 1967 0

  • 1
    25 years
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  • 2
    24 years
    सही
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  • 3
    23 years
    सही
    गलत
  • 4
    22 years
    सही
    गलत
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उत्तर : 1. "25 years"
व्याख्या :

Answer: A) 25 years Explanation: Let varun's age = x yrs. From the given conditions, x+1  =  2(x-12) x = 25 years.

प्र: In a party there are male and female members. If 15 female quit then the number of females will become double the number of males. If 45 males quit no. of female becomes five times the number of males. Find the number of females ? 1963 0

  • 1
    175
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  • 2
    145
    सही
    गलत
  • 3
    165
    सही
    गलत
  • 4
    135
    सही
    गलत
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उत्तर : 1. "175"
व्याख्या :

Answer: A) 175 Explanation: Let the number of males be 'M'Let the number of females be 'F'From the given conditions,(F-15)=2M.....(i)F=5(M-45).....(ii)By solving the equations (1) & (2) we get M = 80 Then substitute M = 80 in (1)F = 2M + 15F = 2 x 80 + 15=> F = 175Therefore, number of males = 80 and females = 175 in the party.

प्र: What profit percent is made by selling an article at a certain price, if by selling at 2/3rd of that price, there would be a loss of 20%   ? 1957 0

  • 1
    30 %
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  • 2
    25 %
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  • 3
    15 %
    सही
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  • 4
    20 %
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उत्तर : 4. "20 %"
व्याख्या :

Answer: D) 20 % Explanation: SP2 = 2/3 SP1CP = 100SP2 = 802/3 SP1 = 80 SP1 = 120100 --- 20   => 20%

प्र: A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey ? 1948 0

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

Answer: D) 4 kmph Explanation: Speed of Man = 4.5 kmphSpeed of stream = 1.5 kmphSpeed in DownStream = 6 kmphSpeed in UpStream = 3 kmphAverage Speed = (2 x 6 x 3)/9 = 4 kmph.

प्र: A fair six-sided die is rolled twice. What is the probability of getting 4 on the first roll and not getting 6 on the second roll ? 1948 0

  • 1
    1/36
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  • 2
    5/36
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  • 3
    1/12
    सही
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  • 4
    1/9
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उत्तर : 2. "5/36"
व्याख्या :

Answer: B) 5/36 Explanation: The two events mentioned are independent. The first roll of the die is independent of the second roll. Therefore the probabilities can be directly multiplied. P(getting first 4) = 1/6 P(no second 6) = 5/6 Therefore P(getting first 4 and no second 6) = 1/6 x 5/6 = 5/36

प्र: The Simple interest accrued on an amount of Rs. 2,500 at the end of six years is Rs.1875. What would be the simple interest accrued on an amount of Rs. 6875 at the same rate and Same period? 1944 0

  • 1
    Rs. 4,556.5
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  • 2
    Rs. 5,025.25
    सही
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  • 3
    Rs.5,245.5
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  • 4
    None of these
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उत्तर : 4. "None of these"
व्याख्या :

Answer: D) None of these Explanation:

प्र: Two numbers are respectively 40% and 30% more than a third number. The second number expressed in terms of percentage of the first is ? 1942 0

  • 1
    92.8%
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  • 2
    84.23%
    सही
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  • 3
    87.14%
    सही
    गलत
  • 4
    94.1%
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उत्तर : 1. "92.8%"
व्याख्या :

Answer: A) 92.8% Explanation: Here, x = 40 and y = 30;Therefore second number= [[100+y100+x] x 100 ]% of first number= [[100+y100+x] x 100 ]% of first numberSecond number = 92.8% of the first number.

प्र: Madhu started a business and he invested in 76000, After some month, Amar came to join with him and invest 57000.The end of the year the total profit was divided among them into ratio form 2 : 1.Find after how many months Amar join. 1938 0

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

Answer: D) 4 months Explanation: we can assume that Amar join into business after x months. So Amar money was invest into  (12 – x ) months.   76000×1257000×(12-x)=21   --> 912000 = 114000 ( 12 – x ) = 114 ( 12 – x ) = 912 --> x = 4 After 4 months amar join the business.

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