Quantitative Aptitude Practice Question and Answer

Q: A milkman claims to sell milk at its cost price, still, he is making a profit of 30% since he has mixed some amount of water in the milk. What is the % of milk in the mixture? 3435 0

  • 1
    71.02%
    Correct
    Wrong
  • 2
    76.92%
    Correct
    Wrong
  • 3
    63.22%
    Correct
    Wrong
  • 4
    86.42%
    Correct
    Wrong
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Answer : 2. "76.92%"
Explanation :

Answer: B) 76.92% Explanation: Let the milk he bought is 1000 ml Let C.P of 1000 ml is Rs. 100 Here let he is mixing K ml of water He is getting 30% profit => Now, the selling price is also Rs. 100 for 1000 ml => 100 : K% = 100 : 30 10 : 3 is ratio of milk to water => Percentage of milk = 10 x 100/13 = 1000/13 = 76.92%

Q: Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes  ? 3403 0

  • 1
    21 min
    Correct
    Wrong
  • 2
    24 min
    Correct
    Wrong
  • 3
    20 min
    Correct
    Wrong
  • 4
    22 min
    Correct
    Wrong
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Answer : 1. "21 min"
Explanation :

Answer: A) 21 min Explanation: Let the pipe B be closed after 'K' minutes. 30/16 - K/24 = 1 => K/24 = 30/16 - 1 = 14/16 => K = 14/16 x 24 = 21 min.

Q: Time taken by P alone to finish a work is 50% more than the time taken by P and Q together. Q is thrice as efficient as R. If Q and R together can complete the work in 22.5 days, then how many days will P alone take to complete the work ? 3403 0

  • 1
    17 days
    Correct
    Wrong
  • 2
    11 days
    Correct
    Wrong
  • 3
    15 days
    Correct
    Wrong
  • 4
    16 days
    Correct
    Wrong
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Answer : 3. "15 days"
Explanation :

Answer: C) 15 days Explanation: We know that Time is inversely proportional to Efficiency Here given time ratio of P & P+Q as P/P+Q = 150/100 = 3:2 Efficiency ratio of P & Q as P:Q = 2:1 ....(1) Given Efficiency ratio of Q & R as Q:R = 3:1 ....(2) From (1) & (2), we get P:Q:R = 6:3:1 P alone can finish the work in 22.5(3+1)/6 = 15 days.

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Answer : 3. "Both A & B gives result"
Explanation :

Answer: C) Both A & B gives result Explanation: a and b give, profit after 3 years = Rs.(3/8 x 22000) = Rs.8250. From c also, profit after 3 years = Rs. (2750 x 3) = Rs. 8250. ∴ P's share = Rs.(8250 x 5/11) = Rs. 3750. Thus, (either C is redundant) or (a and b are redundant).

Q: A complete a work at four times the speed than C. If together they can complete a work in 20 days, in how many days can A alone complete it? 3363 0

  • 1
    25
    Correct
    Wrong
  • 2
    100
    Correct
    Wrong
  • 3
    75
    Correct
    Wrong
  • 4
    80
    Correct
    Wrong
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Answer : 1. "25"

Q: The marked price of a certain object is Rs 10,000. Shopkeeper gives three consecutive discounts of 10%, 20%, 30%. Find the selling price of the object. 3360 1

  • 1
    Rs 6000
    Correct
    Wrong
  • 2
    Rs 6340
    Correct
    Wrong
  • 3
    Rs 5040
    Correct
    Wrong
  • 4
    Rs 7000
    Correct
    Wrong
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Answer : 3. "Rs 5040 "

Q: A machine was sold at 10% Profit had it been sold for Rs 80 less the seller would have incurred 10% loss. What is cost price of Machine? 3360 2

  • 1
    350
    Correct
    Wrong
  • 2
    400
    Correct
    Wrong
  • 3
    450
    Correct
    Wrong
  • 4
    520
    Correct
    Wrong
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Answer : 2. "400"

Q: A Certain sum of money an amounts to Rs 2500 in a span Of 5 years and further to Rs.3000 in a span of 7 years at simple interest The sum is ? 3360 0

  • 1
    Rs. 1800
    Correct
    Wrong
  • 2
    Rs. 2000
    Correct
    Wrong
  • 3
    Rs. 1400
    Correct
    Wrong
  • 4
    Rs. 1250
    Correct
    Wrong
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Answer : 4. "Rs. 1250"
Explanation :

Answer: D) Rs. 1250 Explanation: 2500 in 5th year and 3000 in 7th year So in between 2 years Rs. 500 is increased => for a year 500/2 = 250So, per year it is increasing Rs.250 then in 5 years => 250 x 5 = 1250Hence, the initial amount must be 2500 - 1250 = Rs. 1250

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