Quantitative Aptitude Practice Question and Answer

Q: A letter is takenout at random from 'ASSISTANT'  and another is taken out from 'STATISTICS'. The probability that they are the same letter is : 1708 0

  • 1
    35/96
    Correct
    Wrong
  • 2
    19/90
    Correct
    Wrong
  • 3
    19/96
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 2. "19/90"
Explanation :

Answer: B) 19/90 Explanation: ASSISTANT→AAINSSSTT STATISTICS→ACIISSSTTT Here N and C are not common and same letters can be A, I, S, T. Therefore  Probability of choosing A =  2C19C1×1C110C1 = 1/45   Probability of choosing I = 19C1×2C110C1 = 1/45 Probability of choosing S = 3C19C1×3C110C1 = 1/10 Probability of choosing T = 2C19C1×3C110C1 = 1/15 Hence, Required probability =   145+145+110+115= 1990

Q: 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. 1706 0

  • 1
    7 months
    Correct
    Wrong
  • 2
    8 months
    Correct
    Wrong
  • 3
    3 months
    Correct
    Wrong
  • 4
    4 months
    Correct
    Wrong
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Answer : 4. "4 months"
Explanation :

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.

Q: Find the number which multiplied by 15 is increased by 56  ? 1702 0

  • 1
    6
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    12
    Correct
    Wrong
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Answer : 2. "4"
Explanation :

Answer: B) 4 Explanation: Let the number be x. Then, 15x - x = 56 x = 4

Q: A man can row upstream at 16 km/hr and downstream at 24 km/hr. Find the speed of the current. 1699 0

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

Answer: A) 4 kmph Explanation: Speed of the current = 24-16/2 = 8/2 = 4 km/hr.

Q: K is 4 times as fast as L and working together, they can complete a work in 24 days. In how many days can L alone complete the work ? 1697 0

  • 1
    30 days
    Correct
    Wrong
  • 2
    40 days
    Correct
    Wrong
  • 3
    120 days
    Correct
    Wrong
  • 4
    80 days
    Correct
    Wrong
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Answer : 1. "30 days"
Explanation :

Answer: A) 30 days Explanation: Given K=4L  -->K+L = 4L+L = 5L   These 5L people can complete the work in 24 days, which means L alone can do the work in (24 x 5)=120 days.   Hence, K alone can do the work in 120/4= 30 days.

Q: Find the Odd One Out? 3, 4, 14, 48, 576, 27648 1694 0

  • 1
    4
    Correct
    Wrong
  • 2
    14
    Correct
    Wrong
  • 3
    48
    Correct
    Wrong
  • 4
    27648
    Correct
    Wrong
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Answer : 2. "14"
Explanation :

Answer: B) 14 Explanation: Given Number series is :   3   4   14   48   576   27648   It follows a pattern that,   3   4   4 x 3 = 12   but not 14   12 x 4 = 48   48 x 12 = 576   576 x 48 = 27648       Hence, the odd one in the given Number Series is 14.

Q: In a certain Business, the profit is 220% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit ? 1694 0

  • 1
    61%
    Correct
    Wrong
  • 2
    75%
    Correct
    Wrong
  • 3
    55%
    Correct
    Wrong
  • 4
    81%
    Correct
    Wrong
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Answer : 1. "61%"
Explanation :

Answer: A) 61% Explanation: Let C.P.= Rs. 100. Then, Profit = Rs.220,  S.P. = Rs.320.   New C.P. = 125% of Rs. 100 = Rs. 125  New S.P. = Rs.320. Profit = Rs. (320 - 125) = Rs. 195   Required percentage = 195320×100== 60.9 =~ 61%

Q: What will come in place of the question mark (?) in the following number series  ? 12, 24, 26.5, 79.5, ?, 330 1693 0

  • 1
    211
    Correct
    Wrong
  • 2
    101.5
    Correct
    Wrong
  • 3
    82.5
    Correct
    Wrong
  • 4
    99
    Correct
    Wrong
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Answer : 3. "82.5"
Explanation :

Answer: C) 82.5 Explanation: The given series    12   24   26.5   79.5   ?   330 follows a pattern that,   12 x 2 = 24   24 + 2.5 = 26.5   26.5 x 3 = 79.5   79.5 + 3 = 82.5   82.5 x 4 = 330   Hence, the missing number is 82.5

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