Quantitative Aptitude Practice Question and Answer

Q: 3 men, 4 women and 6 children can complete a work in 7 days. A woman does double the work a man does and a child does half the work a man does. How many women alone can complete this work in 7 days  ? 5759 0

  • 1
    6
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    7
    Correct
    Wrong
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Answer : 4. "7"
Explanation :

Answer: D) 7 Explanation: Let 1 woman's 1 day work = x. Then, 1 man's 1 day work = x/2 and 1 child's 1 day work  x/4. So, (3x/2 + 4x + + 6x/4) = 1/7 28x/4 = 1/7 => x = 1/49 1 woman alone can complete the work in 49 days. So, to complete the work in 7 days, number of women required = 49/7 = 7.

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Answer : 2. "1/5"
Explanation :

Answer: B) 1/5 Explanation: Number of applicants = 5On a day, only 1 leave is approved.Now favourable events =  1 of 5 applicants is approvedProbability that Laxmi priya's leave is granted = 1/5.

Q: One year ago the ratio between Maneela’s and Shanthi’s salary was 3 : 4. The ratios of their individual salaries between last year’s and this year’s salaries are 4 : 5 and 2 : 3 respectively. At present the total of their salary is Rs. 4160. The salary of Maneela, now is? 5699 0

  • 1
    Rs. 1600
    Correct
    Wrong
  • 2
    Rs. 1700
    Correct
    Wrong
  • 3
    Rs. 1800
    Correct
    Wrong
  • 4
    Rs. 1900
    Correct
    Wrong
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Answer : 1. "Rs. 1600"
Explanation :

Answer: A) Rs. 1600 Explanation: Let the salaries of Maneela and Shanthi one year before be M1, S1 & now be M2, S2 respectively. Then, from the given data, M1/S1 = 3/4  .....(1) M1/M2 = 4/5 .....(2) S1/S2 = 2/3  .....(3) and M2 + S2 = 4160  .....(4)   Solving all these eqtns, we get M2 = Rs. 1600.

Q: How many degrees will the minute hand move, in the same time in which the second hand move 4800 ? 5532 0

  • 1
    80 deg
    Correct
    Wrong
  • 2
    160 deg
    Correct
    Wrong
  • 3
    140 deg
    Correct
    Wrong
  • 4
    135 deg
    Correct
    Wrong
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Answer : 1. "80 deg"
Explanation :

Answer: A) 80 deg Explanation: As minute hand covers, 60 degrees Minute hand covers 4800/60 = 80°

Q: What is the number of digits in 333? Given that log3 = 0.47712? 5482 0

  • 1
    12
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    14
    Correct
    Wrong
  • 4
    15
    Correct
    Wrong
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Answer : 2. "13"
Explanation :

Answer: B) 13 Explanation:  Let   Let x=333 = 333    Then, logx = 33 log3     = 27 x 0.47712 = 12.88224    Since the characteristic in the resultant value of log x is 12   ∴The number of digits in x is (12 + 1) = 13    Hence the required number of digits in 333is 13.

Q: A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior ? 5446 0

  • 1
    ²²C₁₀ + 1
    Correct
    Wrong
  • 2
    ²²C₉ + ¹⁰C₁
    Correct
    Wrong
  • 3
    ²²C₁₀
    Correct
    Wrong
  • 4
    ²²C₁₀ - 1
    Correct
    Wrong
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Answer : 4. "²²C₁₀ - 1"
Explanation :

Answer: D) ²²C₁₀ - 1 Explanation: The total number of ways of forming the group of ten representatives is ²²C₁₀. The total number of ways of forming the group that consists of no seniors is ¹⁰C₁₀ = 1 way The required number of ways = ²²C₁₀ - 1

Q: A sum of Rs. 427 is to be divided among A, B and C in such a way that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal. The share of C is ? 5319 0

  • 1
    64
    Correct
    Wrong
  • 2
    76
    Correct
    Wrong
  • 3
    84
    Correct
    Wrong
  • 4
    98
    Correct
    Wrong
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Answer : 3. "84"
Explanation :

Answer: C) 84 Explanation: Given total sum = Rs. 427And given that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal.=> 3A = 4B = 7CBut given=> A + B + C = 427Now express A and B in terms of C i.e=> (7C/3) + (7C/4) + C = 427=> C = 84

Q: Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ? 5241 0

  • 1
    4 days
    Correct
    Wrong
  • 2
    8 days
    Correct
    Wrong
  • 3
    3 days
    Correct
    Wrong
  • 4
    6 days
    Correct
    Wrong
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Answer : 4. "6 days"
Explanation :

Answer: D) 6 days Explanation: 4/10 + 9/x = 1     => x = 15    Then both can do in  1/10 + 1/15 = 1/6     => 6 days

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