Practice Question and Answer

Q: If (1 × 2 × 3 × 4 ........ × n) = n!, then 15! - 14! - 13! is equal to ___? 3270 0

  • 1
    14 × 13 × 13!
    Correct
    Wrong
  • 2
    15 × 14 × 14!
    Correct
    Wrong
  • 3
    14 × 12 × 12!
    Correct
    Wrong
  • 4
    15 × 13 × 13!
    Correct
    Wrong
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Answer : 4. "15 × 13 × 13!"
Explanation :

Answer: D) 15 × 13 × 13! Explanation: 15! - 14! - 13! = (15 × 14 × 13!) - (14 × 13!) - (13!) = 13! (15 × 14 - 14 - 1) = 13! (15 × 14 - 15) = 13! x 15 (14 - 1) = 15 × 13 × 13!

Q: Pointing towards a man, a woman said, "His mother is the only daughter of my mother." How is the woman related to the man? 3269 0

  • 1
    Mother
    Correct
    Wrong
  • 2
    Grandmother
    Correct
    Wrong
  • 3
    Sister
    Correct
    Wrong
  • 4
    Daughter
    Correct
    Wrong
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Answer : 1. "Mother"

Q:

Four friends A, B, C, D are sitting in a coffee shop. A and B are sitting face to face. D is not sitting face to face. D is not sitting next of A but can see the facial expression of A clearly. B is talking to C who is sitting opposite to him who are sitting together? 

3269 0

  • 1
    A and C
    Correct
    Wrong
  • 2
    A and D
    Correct
    Wrong
  • 3
    D and C
    Correct
    Wrong
  • 4
    A and B
    Correct
    Wrong
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Answer : 1. "A and C"

Q:

Who is the most intense planet in the solar system?

3269 0

  • 1
    Mars
    Correct
    Wrong
  • 2
    Saturn
    Correct
    Wrong
  • 3
    Venus
    Correct
    Wrong
  • 4
    Buddha
    Correct
    Wrong
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Answer : 4. "Buddha"

Q: Hemoglobin in humans has the highest affinity for which of the following gases? 3268 0

  • 1
    Methane
    Correct
    Wrong
  • 2
    Carbon Monoxide
    Correct
    Wrong
  • 3
    Nitrous oxide
    Correct
    Wrong
  • 4
    Carbon dioxide
    Correct
    Wrong
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Answer : 2. "Carbon Monoxide"

Q:

A tank is fitted with two taps. The first tap can fill the tank completely in 45 minutes and the second tap can empty the full tank in one hour. If both the taps are opened alternately for one minute, then in how many hours the empty tank will be filled completely?

3268 0

  • 1
    2 hours 55 minutes
    Correct
    Wrong
  • 2
    3 hours 40 minutes
    Correct
    Wrong
  • 3
    4 hours 48 minutes
    Correct
    Wrong
  • 4
    5 hours 53 minutes
    Correct
    Wrong
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Answer : 4. "5 hours 53 minutes"

Q:

If P means -, Q means +, R means x and  S means ÷ then what is the value of  8 R6S3Q5P9 

3268 0

  • 1
    12
    Correct
    Wrong
  • 2
    10
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 1. "12 "

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