Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: P alone can complete a piece of work in 6 days. Work done by Q alone in one day is equal to one-third of the work done by P alone in one day. In how many days can the work be completed if P and Q work together  ? 2777 0

  • 1
    5 (2/3)
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  • 2
    6 (3/4 )
    सही
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  • 3
    4 (1/2)
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  • 4
    3
    सही
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उत्तर : 3. "4 (1/2)"
व्याख्या :

Answer: C) 4 (1/2) Explanation: Work done by P alone in one day = 1/6th of the total work done by Q alone in one day = 1/3(of that done by P in one day) = 1/3(1/6 of the total) = 1/18 of the total.    Work done by P and Q, working together in one day = 1/6 + 1/18  = 4/18 = 2/9    They would take 9/2 days = 4 (1/2) days to complete the work working together.

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उत्तर : 2. "15:8"

प्र: An alloy contains gold and silver in the ratio 5 : 8 and another alloy contains gold and silver in the ratio 5 : 3. If equal amount of both the alloys are melted together, then the ratio of gold and silver in the resulting alloy is ? 2772 0

  • 1
    113/108
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  • 2
    105/103
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  • 3
    108/115
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  • 4
    103/113
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उत्तर : 2. "105/103"
व्याख्या :

Answer: B) 105/103 Explanation: As given equal amounts of alloys are melted, let it be 1 kg. Required ratio of gold and silver = 513 + 58813 + 38 = 105103.   Hence, ratio of gold and silver in the resulting alloy = 105/103.

प्र: Althaf borrows Rs. 1500 from two moneylenders. He pays interest at the rate of 12% per annum for one loan and at the rate of 14% per annum for the other. The total interest he pays for the entire year is Rs. 186. How much does he borrow at the rate of 12% ? 2771 0

  • 1
    Rs. 300
    सही
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  • 2
    Rs. 400
    सही
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  • 3
    Rs. 1200
    सही
    गलत
  • 4
    Rs. 1100
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उत्तर : 3. "Rs. 1200"
व्याख्या :

Answer: C) Rs. 1200 Explanation: Let Althaf lent Rs. A at 14% per year.Hence, Money lent at 12% = (1500-A);Given, total interest = Rs. 186.{(A x 14x 1)/100} + {[(1500-A) x 12 x 1/100]} = 186;14A/100 + (18000 -12A)/100 = 186;14A + 18000 - 12A = 186x100;2A = 18600-18000;A = 600/2 = Rs. 300.Hence, money lent at 12% = 1500-300 = Rs. 1200.

प्र: What is better, to have 70% discount or 40 and 30% discount consequently ? 2748 0

  • 1
    40% is better
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  • 2
    70% is better
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  • 3
    Both are same
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  • 4
    None
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उत्तर : 2. "70% is better"
व्याख्या :

Answer: B) 70% is better Explanation: Let Price be Rs.100 1st CASE: Then 100 x 70/100 = 70=> price after discount = 100-70 = Rs.30 2nd CASE: Then 100 x 40/100 = 40=> price after discount = 100-40 = Rs.60then60 x 30/100 = 18=> price after 2 consequent discount = 60-18 = Rs.42 =>from 1 and 2 cases, 70% discount is better.

प्र: If the sides of a triangle are 26 cm, 24 cm and 10 cm, what is its area ? 2743 0

  • 1
    108 sq.cm
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  • 2
    112 sq.cm
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  • 3
    116 sq.cm
    सही
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  • 4
    120 sq.cm
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उत्तर : 4. "120 sq.cm"
व्याख्या :

Answer: D) 120 sq.cm Explanation: The triangle with sides 26 cm, 24 cm and 10 cm is right angled, where the hypotenuse is 26 cm. Area of the triangle =1/2 x base x height => 1/2 x 24 x 10 = 120 sq.cm

प्र: Given that on 9th August 2016 is Saturday. What was the day on 9th August 1616 ? 2743 0

  • 1
    Saturday
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  • 2
    Sunday
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  • 3
    Friday
    सही
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  • 4
    Monday
    सही
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उत्तर : 1. "Saturday"
व्याख्या :

Answer: A) Saturday Explanation: We know that, After every 400 years, the same day occurs.Thus, if 9th August 2016 is Saturday, before 400 years i.e., on 9th August 1616 has to be Saturday.

प्र: A user type a content on 20 sheets, each sheet consist of 55 lines, and each line can have 66 characters. The content is again retyped on another set of sheets, these new sheets have 65 lines and each line can take 70 characters. Calculate the reduction in sheets ? 2742 0

  • 1
    2 or 60%
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  • 2
    4 or 20%
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  • 3
    6 or 10%
    सही
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  • 4
    8 or 5%
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उत्तर : 2. "4 or 20%"
व्याख्या :

Answer: B) 4 or 20% Explanation: 20 x 55 x 66 = L x 65 x 70Here L = 72,600/4550 = 15.95 =~ 16Reduction is 20-16 = 4 which is 20% reduction.

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