Quantitative Aptitude Practice Question and Answer

Q: Which one of the following is not a prime number? 1832 0

  • 1
    91
    Correct
    Wrong
  • 2
    71
    Correct
    Wrong
  • 3
    41
    Correct
    Wrong
  • 4
    31
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "91"
Explanation :

Answer: A) 91 Explanation: Prime Numbers :: Numbers which are divisible by only 1 and itself are Prime Numbers.   It's answer will be 91. Because 91 can be divisible by 7,13,91,1. It is quite clear that prime number should be divisible only by itself and by 1.

Q: A shopkeeper sold a mobile phone for Rs. 12000. Had he offered discount of 10% on the selling price, there would be a loss of 4%. What is the cost price of that Mobile phone? 1830 0

  • 1
    Rs. 12,500
    Correct
    Wrong
  • 2
    Rs. 11,250
    Correct
    Wrong
  • 3
    Rs. 12,750
    Correct
    Wrong
  • 4
    Rs. 11,680
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "Rs. 11,250"
Explanation :

Answer: B) Rs. 11,250 Explanation: Given that SP = Rs. 12000 - 10%  = Rs. 10,800 Loss% = 4 We know that, C.P = 100/(100 - Loss%) x 100 => 100/100-4 x 10800 => 1080000/96 C.P = Rs. 11,250

Q: The milk and water in two vessels A and B are in the ratio 4:3 and 2:3 respectively. In what ratio the liquids in both the vessels be mixed to obtain a new mixture in vessel c consisting half milk and half water? 1830 0

  • 1
    8:3
    Correct
    Wrong
  • 2
    6:7
    Correct
    Wrong
  • 3
    7:5
    Correct
    Wrong
  • 4
    11:7
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "7:5"
Explanation :

Answer: C) 7:5 Explanation: Milk in 1-litre mixture of A = 4/7 litre.  Milk in 1-litre mixture of B = 2/5 litre.  Milk in 1-litre mixture of C = 1/2 litre.   By rule of alligation we have required ratio X:Y       X                  :                 Y     4/7                                2/5              \                      /               (Mean ratio)                   (1/2)             /                      \  (1/2 – 2/5)     :       (4/7 – 1/2)       1/10                      1/1 4    So Required ratio = X : Y = 1/10 : 1/14 = 7:5

Q: In how many ways the letters of the word OLIVER be arranged so that the vowels in the word always occur in the dictionary order as we move from left to right ? 1829 0

  • 1
    186
    Correct
    Wrong
  • 2
    144
    Correct
    Wrong
  • 3
    136
    Correct
    Wrong
  • 4
    120
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "120"
Explanation :

Answer: D) 120 Explanation: In given word OLIVER there are 3 vowels E, I & O. These can be arranged in only one way as dictionary order E, I & O.   There are 6 letters in thegiven word.   First arrange 3 vowels.   This can be done in 6C3 ways and that too in only one way.(dictionary order E, I & O)   Remaining 3 letters can be placed in 3 places = 3! ways   Total number of possible ways of arranging letters of OLIVER = 3! x C36 ways = 6x5x4 = 120 ways.

Q: Two persons K and L can complete a piece of work in 30 days and 45 days respectively. If they work together, what part of the work will be completed in 3 days ? 1827 0

  • 1
    1/6
    Correct
    Wrong
  • 2
    1/3
    Correct
    Wrong
  • 3
    2/3
    Correct
    Wrong
  • 4
    1/18
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "1/6"
Explanation :

Answer: A) 1/6 Explanation: K's one day's work = 1/30 L's one day's work = 1/45 (K + L)'s one day's work = 1/30 + 1/45 = 1/18 The part of the work completed in 3 days = 3 (1/18) = 1/6.

Q: How many digits will be there to the right of the decimal point in the product of 85.44 and .08455 ? 1825 0

  • 1
    7
    Correct
    Wrong
  • 2
    5
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "6"
Explanation :

Answer: D) 6 Explanation: Sum of decimal places = 7. Since the last digit to the extreme right will be zero (since 4 x 5 = 20), so there will be 6 significant digits to the right of the decimal point.

Q: In one year, the Amount collected for social welfare, of a village increased by 10% and in the next year, it decreased by 10%. If at the end of 2nd year, the amount was 7920, what was it in the beginning ? 1824 0

  • 1
    8800
    Correct
    Wrong
  • 2
    8650
    Correct
    Wrong
  • 3
    8000
    Correct
    Wrong
  • 4
    8980
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "8000"
Explanation :

Answer: C) 8000 Explanation: Let the amount collected be 'A'Then, from the given conditions,A x 110/100 x 90/100 = 7920 A x 0.99 = 7920 A = 7920/0.99=> 8000

Q: Find the odd one out of the group ? 1823 0

  • 1
    708
    Correct
    Wrong
  • 2
    392
    Correct
    Wrong
  • 3
    618
    Correct
    Wrong
  • 4
    816
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "392"
Explanation :

Answer: B) 392 Explanation: The sum of the digits in 708, 618 and 816 is 15, but not in 392.

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully