CAT Practice Question and Answer

Q: K can finish the work in 18 days and L can do the same work in 15 days. L worked for 10 days and left the job. In how many days, K alone can finish the remaining work ? 1950 0

  • 1
    5.5 days
    Correct
    Wrong
  • 2
    6 days
    Correct
    Wrong
  • 3
    4.2 days
    Correct
    Wrong
  • 4
    5 days
    Correct
    Wrong
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Answer : 2. "6 days"
Explanation :

Answer: B) 6 days Explanation: L's 10 days work = 115×10=23   Remaining work = 1-23=13   Now,  work is done by K in one day = 1/18   1/3 work is done by K in  18×13 = 6 days

Q: In the following sum, “?” stands for which digit ? 8 + ?8 + 28 + 83 + 8? = 2?8 1950 0

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

Answer: D) 1 Explanation: By trial and error method from the given options, '1' satisfies the above given equation.

Q: What is the capital city of Cambodia? 1950 0

  • 1
    Phnom Penh
    Correct
    Wrong
  • 2
    Hanoi
    Correct
    Wrong
  • 3
    Lamur
    Correct
    Wrong
  • 4
    Bangkok
    Correct
    Wrong
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Answer : 1. "Phnom Penh"
Explanation :

Answer: A) Phnom Penh Explanation: Cambodia Capital- Phnom Penh, Currency- Cambodian riel.

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Answer : 3. "Only b follows"
Explanation :

Answer: C) Only b follows Explanation: Clearly, reducing the number of aspirants for admission to colleges or sending the students of well-to-do families to foreign countries for higher studies, is no proper solution. So, both I and III do not follow. The right solution is to increase the number of colleges so as t accommodate the increasing number of admission-seekers. So, only II follows.

Q: How many meshes are there in 1 squrare meter of wire gauge if each mesh is 8mm long and 5mm wide ? 1950 0

  • 1
    2500
    Correct
    Wrong
  • 2
    25000
    Correct
    Wrong
  • 3
    12500
    Correct
    Wrong
  • 4
    15400
    Correct
    Wrong
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Answer : 2. "25000"
Explanation :

Answer: B) 25000 Explanation: We know that,   One square meter is equal to 10,00,000 sq mm.Given, each mesh is 8mm length and 5mm wideTherefore for each mesh : 8 x 5 = 40 sq mm.So, number of meshes = 100000040 = 25000.

Q: Find the quadratic equations whose roots are the reciprocals of the roots of 2x2+5x+3? 1949 0

  • 1
    3x2+5x+2=0
    Correct
    Wrong
  • 2
    5x2+3x+2=0
    Correct
    Wrong
  • 3
    3x2-5x-2=0
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "3x2+5x+2=0"
Explanation :

Answer: A) A Explanation: The quadratic equation whose roots are reciprocal of 2x2+5x+3=0 can be obtained by replacing x by 1/x.   Hence, 2(1/x)(1/x)+ 5(1/x) + 3 = 0   => 3x2+5x+2=0

Q: Addis Ababa is the Capital city of 1949 0

  • 1
    Angola
    Correct
    Wrong
  • 2
    Burundi
    Correct
    Wrong
  • 3
    Chile
    Correct
    Wrong
  • 4
    Ethiopia
    Correct
    Wrong
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Answer : 4. "Ethiopia"
Explanation :

Answer: D) Ethiopia Explanation: The Capital city of Ethiopia is Addis Ababa.   Countries and Capital cities :: Angola  -  Launda Burundi  -  Bujumbura Chile  -  Santiago

Q: Which statement about capillaries is correct? 1948 0

  • 1
    their walls are covered with cilia
    Correct
    Wrong
  • 2
    they warm and humidify inhaled air
    Correct
    Wrong
  • 3
    their walls are only one cell thick
    Correct
    Wrong
  • 4
    they move mucus through the lungs
    Correct
    Wrong
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Answer : 3. "their walls are only one cell thick"
Explanation :

Answer: C) their walls are only one cell thick Explanation: Capillaries Tiny blood vessels connecting arteries to veins. These blood vessels carry oxygen and nutrients to individual cells. Capillaries are the smallest blood vessels in the body, and have walls only one or two cells thick. (Their diameter is 5 to 10 micrometers, or 5 to 10 millionths of a meter.)   Capillaries connect arterioles and venules, which are the smaller extensions of the larger arteries and veins.

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