Quantitative Aptitude Practice Question and Answer

Q: If the given two numbers are respectively 7% and 28% of a third number, then what percentage is the first of the second ? 1836 0

  • 1
    24%
    Correct
    Wrong
  • 2
    29%
    Correct
    Wrong
  • 3
    34%
    Correct
    Wrong
  • 4
    25%
    Correct
    Wrong
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Answer : 4. "25%"
Explanation :

Answer: D) 25% Explanation: Here, k = 7 and l = 28Therefore, first number = klx100 % of second number = 7/28 x 100% of second number = 25% of second number.

Q: Excluding stoppages, the average speed of a bus is 60 km/hr and including stoppages, the average speed of the bus is 40 km/hr. For how many minutes does the bus stop per hour ? 1833 0

  • 1
    2 hrs
    Correct
    Wrong
  • 2
    20 min
    Correct
    Wrong
  • 3
    40 min
    Correct
    Wrong
  • 4
    30 min
    Correct
    Wrong
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Answer : 2. "20 min"
Explanation :

Answer: B) 20 min Explanation: In 1hr, the bus covers 60 km without stoppages and 40 km with stoppages. Stoppage time = time take to travel (60 - 40) km i.e 20 km at 60 km/hr. stoppage time = 20/60 hrs = 20 min.

Q: If a+b=5 and 3a+2b=20,then (3a+b)will be : 1829 0

  • 1
    20
    Correct
    Wrong
  • 2
    15
    Correct
    Wrong
  • 3
    25
    Correct
    Wrong
  • 4
    30
    Correct
    Wrong
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Answer : 3. "25"
Explanation :

Answer: C) 25 Explanation: a+b=5   ...(1)    and    3a+2b=20 ...(2)   Multiplying (1) by 2 and subtracting from (2), we get : a=10.   Putting a=10 in (1), we get : b=-5   Therefore,   (3a+b) = 3 x 10+(-5)=30-5=25.

Q: Express 6.72 % in ratio ? 1825 0

  • 1
    65 : 124
    Correct
    Wrong
  • 2
    42 : 625
    Correct
    Wrong
  • 3
    21 : 125
    Correct
    Wrong
  • 4
    37 : 442
    Correct
    Wrong
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Answer : 2. "42 : 625"
Explanation :

Answer: B) 42 : 625 Explanation: 6.72/100 = 672/10000 = 42/625

Q: Vishal invested 10% more than Trishul. Trishul invested 10% less than Raghu. If the total sum of their investments is Rs. 5780, how much amount did Raghu invest ? 1825 0

  • 1
    Rs.2010
    Correct
    Wrong
  • 2
    Rs.2200
    Correct
    Wrong
  • 3
    Rs.2000
    Correct
    Wrong
  • 4
    Rs.2100
    Correct
    Wrong
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Answer : 3. "Rs.2000"
Explanation :

Answer: C) Rs.2000 Explanation: Let money invested by Raghu = Rs. xMoney invested by Trishul = 9/10 x = 0.9xMoney invested by Vishal = 9/10x * 110/100 = 0.99xAlso, x+0.9x+0.99x = 5780= x= 5780/2.89 = 2000 Therefore, amount invested by Raghu is Rs. 2000.

Q: Two bus tickets from city K to L and three tickets from city K to M cost Rs. 77,  but three tickets from city K to L and two tickets from city K to M cost Rs. 73. What are the fares for cities L and M from K ? 1822 0

  • 1
    Rs. 13 and Rs. 17
    Correct
    Wrong
  • 2
    Rs. 17 and Rs. 19
    Correct
    Wrong
  • 3
    Rs. 23 and Rs. 17
    Correct
    Wrong
  • 4
    Rs. 13 and Rs. 19
    Correct
    Wrong
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Answer : 1. "Rs. 13 and Rs. 17"
Explanation :

Answer: A) Rs. 13 and Rs. 17 Explanation: If fares for cities L and M from K are x and y respectively, then 2x + 3y = 77 or 6x + 9y = 231...(1)3x + 2y = 73 or 6x + 4y = 146...(2) subtracting 2 from 1, we get 5y = 85 y = Rs. 17 => x = Rs. 13

Q: A man rows his boat 60 km downstream and 30 km upstream taking 3 hrs each time. Find the speed of the stream ? 1822 0

  • 1
    5 kmph
    Correct
    Wrong
  • 2
    10 kmph
    Correct
    Wrong
  • 3
    15 kmph
    Correct
    Wrong
  • 4
    45 kmph
    Correct
    Wrong
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Answer : 1. "5 kmph"
Explanation :

Answer: A) 5 kmph Explanation: Speed of the boat downstream  s=a/t= 60/3 = 20 kmph Speed of the boat upstream s= d/t = 30/3= 10 kmph   Therefore,  The speed of the stream = speed of downstream - speed of upstream2=5 kmph

Q: Find the odd term from the given series of numbers  ? 125, 127, 130, 135, 142, 153, 165 ? 1821 0

  • 1
    153
    Correct
    Wrong
  • 2
    165
    Correct
    Wrong
  • 3
    142
    Correct
    Wrong
  • 4
    127
    Correct
    Wrong
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Answer : 2. "165"
Explanation :

Answer: B) 165 Explanation: From the beginning, the next term comes by adding prime numbers in a sequence of 2, 3, 5, 7, 9, 11, 13... to its previous term. But 165 will not be in the series as it must be replaced by 166 since 153+13 = 166.

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