CAT Practice Question and Answer

Q: How many 7 digit numbers can be formed using the digits 1, 2, 0, 2, 4, 2, 4? 2928 0

  • 1
    120
    Correct
    Wrong
  • 2
    360
    Correct
    Wrong
  • 3
    240
    Correct
    Wrong
  • 4
    424
    Correct
    Wrong
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Answer : 2. "360"
Explanation :

Answer: B) 360 Explanation: There are 7 digits 1, 2, 0, 2, 4, 2, 4 in which 2 occurs 3 times, 4 occurs 2 times.    Number of 7 digit numbers = 7!3!×2! = 420   But out of these 420 numbers, there are some numbers which begin with '0' and they are not 7-digit numbers. The number of such numbers beginning with '0'.   =6!3!×2! = 60   Hence the required number of 7 digits numbers = 420 - 60 = 360

Q: Rs. 7444 is divided among 5 ladies, 3 gents and 3 girls. The ratio of share of a lady, a gents and a girl is 7: 4: 3. What is the share of gents ? 2926 0

  • 1
    Rs. 1595.14
    Correct
    Wrong
  • 2
    Rs. 1793.4
    Correct
    Wrong
  • 3
    Rs. 595.14
    Correct
    Wrong
  • 4
    Rs. 1551.5
    Correct
    Wrong
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Answer : 1. "Rs. 1595.14"
Explanation :

Answer: A) Rs. 1595.14 Explanation: Ratio of the share of a lady, a gents and a girl is 7 : 4 : 3No of ladies, gents and girls are 5, 3, 3Thus effective ratio of ladies, gents and girls is 7 x 5 : 4 x 3 : 3 x 3 = 35 : 12 : 9so part of gents = (12/56) x 7444 = Rs. 1595.142so part of 1 gents = 1595.142/3 = Rs. 531.71.

Q: 80% of 900 + 162 x 4 x ? = 113 - 99 2926 0

  • 1
    0.5
    Correct
    Wrong
  • 2
    1
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    0
    Correct
    Wrong
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Answer : 1. "0.5"
Explanation :

Answer: A) 0.5 Explanation: 80x900/100 + 256 x 4 x ? = 1331 - 99 720 + 1024 x ? = 1232 ? = 1232 - 720/1024 ? = 512/1024 = 0.5 ? = 0.5

Q: Compound interest earned on a sum for the second and the third years are Rs.1200 and Rs.1440 respectively. Find the rate of interest ? 2918 0

  • 1
    20% p.a
    Correct
    Wrong
  • 2
    15% p.a
    Correct
    Wrong
  • 3
    18% p.a
    Correct
    Wrong
  • 4
    24% p.a
    Correct
    Wrong
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Answer : 1. "20% p.a"
Explanation :

Answer: A) 20% p.a Explanation: Rs.1440 - 1200 = Rs.240 is the interest on Rs.1200 for one year. Rate of interest = (100 x 240) / (1200) = 20% p.a

Q: Which is the most accurate statement about trade? 2915 0

  • 1
    Trade makes some nations better off and others worse off
    Correct
    Wrong
  • 2
    Trading for a good can make a nation better off only if the nation cannot produce that good itself
    Correct
    Wrong
  • 3
    Trade helps rich nations and hurts poor nations
    Correct
    Wrong
  • 4
    Trade can make every nation better off
    Correct
    Wrong
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Answer : 4. "Trade can make every nation better off"
Explanation :

Answer: D) Trade can make every nation better off Explanation:

Q: Suppose today is Friday, what day of the week will it be 65 days from now? 2910 0

  • 1
    Saturday
    Correct
    Wrong
  • 2
    Sunday
    Correct
    Wrong
  • 3
    Friday
    Correct
    Wrong
  • 4
    Thursday
    Correct
    Wrong
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Answer : 2. "Sunday"
Explanation :

Answer: B) Sunday Explanation: The day of the week repeats every 7 days. Given today is Friday. Again Friday is repeated on the 7th day, 14th,... on 7 multiple days. Hence, Friday is on the 63rd day, as 63 is multiple of 7.   Now, the required day of the week on the 65th day is Sunday.

Q: Antibiotics are mostly obtained from 2901 1

  • 1
    Viruses
    Correct
    Wrong
  • 2
    Fungi
    Correct
    Wrong
  • 3
    Bacteria
    Correct
    Wrong
  • 4
    Angiosperms
    Correct
    Wrong
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Answer : 2. "Fungi"
Explanation :

Answer: B) Fungi Explanation:

Q: Which of the following is not purely output device? 2896 1

  • 1
    Printer
    Correct
    Wrong
  • 2
    Speaker
    Correct
    Wrong
  • 3
    Plotter
    Correct
    Wrong
  • 4
    Screen
    Correct
    Wrong
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Answer : 4. "Screen"
Explanation :

Answer: D) Screen Explanation: A touch screen is the only device which works as both an input and an output device among the given options. You view the options available to you on the screen (output) and you then use your finger to touch the option that you have chosen (input).   Hence, Screen is not purely output device.

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