Practice Question and Answer

Q:

______ is used in yellow lamp street lights.

3634 0

  • 1
    Neon
    Correct
    Wrong
  • 2
    Nitrogen
    Correct
    Wrong
  • 3
    Phosphorous
    Correct
    Wrong
  • 4
    Sodium
    Correct
    Wrong
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Answer : 4. "Sodium"

Q: Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes  ? 3630 0

  • 1
    21 min
    Correct
    Wrong
  • 2
    24 min
    Correct
    Wrong
  • 3
    20 min
    Correct
    Wrong
  • 4
    22 min
    Correct
    Wrong
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Answer : 1. "21 min"
Explanation :

Answer: A) 21 min Explanation: Let the pipe B be closed after 'K' minutes. 30/16 - K/24 = 1 => K/24 = 30/16 - 1 = 14/16 => K = 14/16 x 24 = 21 min.

Q:

In a line 13 persons are sitting. A is seventh from the beginning and two persons 15. sits between G and A. Persons between A and L is same as persons between G and Q, Then what is the position of Q from the beginning?

3627 0

  • 1
    Fourth
    Correct
    Wrong
  • 2
    Eight
    Correct
    Wrong
  • 3
    Sixth
    Correct
    Wrong
  • 4
    Ninth
    Correct
    Wrong
  • 5
    Can't be determined
    Correct
    Wrong
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Answer : 5. "Can't be determined "

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Answer : 1. "3, 3, 8"
Explanation :

Answer: A) 3, 3, 8 Explanation: Let’s break it down. The product of their ages is 72. So what are the possible choices?   2, 2, 18 – sum(2, 2, 18) = 222, 4, 9 – sum(2, 4, 9) = 152, 6, 6 – sum(2, 6, 6) = 142, 3, 12 – sum(2, 3, 12) = 173, 4, 6 – sum(3, 4, 6) = 133, 3, 8 – sum(3, 3, 8 ) = 141, 8, 9 – sum(1,8,9) = 181, 3, 24 – sum(1, 3, 24) = 281, 4, 18 – sum(1, 4, 18) = 231, 2, 36 – sum(1, 2, 36) = 391, 6, 12 – sum(1, 6, 12) = 19   The sum of their ages is the same as your birth date. That could be anything from 1 to 31 but the fact that Jack was unable to find out the ages, it means there are two or more combinations with the same sum. From the choices above, only two of them are possible now.   2, 6, 6 – sum(2, 6, 6) = 143, 3, 8 – sum(3, 3, 8 ) = 14   Since the eldest kid is taking piano lessons, we can eliminate combination 1 since there are two eldest ones. The answer is 3, 3 and 8.

Q:

75% of a number is equal to three-seventh of another number. What is the ratio between the first number and the second number respectively ? 

3624 0

  • 1
    4: 7
    Correct
    Wrong
  • 2
    7:4
    Correct
    Wrong
  • 3
    12 :7
    Correct
    Wrong
  • 4
    7: 12
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 1. "4: 7 "

Q:

Gunpowder consists of a mixture of : 

3623 0

  • 1
    Sand and TNT
    Correct
    Wrong
  • 2
    TNT and charcoal
    Correct
    Wrong
  • 3
    Calcium, Sulphur and charcoal
    Correct
    Wrong
  • 4
    Sulphur, potassium nitrate and charcoal
    Correct
    Wrong
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Answer : 4. "Sulphur, potassium nitrate and charcoal "

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Answer : 3. "C"

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