CAT Practice Question and Answer

Q: Find the next number in the following number series? 11, 13, 30, 96, ? 2431 0

  • 1
    264
    Correct
    Wrong
  • 2
    392
    Correct
    Wrong
  • 3
    412
    Correct
    Wrong
  • 4
    459
    Correct
    Wrong
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Answer : 2. "392"
Explanation :

Answer: B) 392 Explanation: The given number series 11, 13, 30, 96, ? follows a pattern that, 11 11 x 1 + 2 = 13 13 x 2 + 4 = 30 30 x 3 + 6 = 96 96 x 4 + 8 = 392   Hence, the next number in the given series is 392.

Q: Which expression is equivalent to i233? 2430 0

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

Answer: A) i Explanation: We know that, i2 = -1i3 = i2 x i = -1 x i = -ii4 = i2 x i2 = -1 x -1 = 1Hence, i233  =i4 x 58 + 1 = i232 x i1 = 1 x i = i

Q: 88 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be ? 2428 0

  • 1
    112 mts
    Correct
    Wrong
  • 2
    84 mts
    Correct
    Wrong
  • 3
    96 mts
    Correct
    Wrong
  • 4
    108 mts
    Correct
    Wrong
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Answer : 2. "84 mts"
Explanation :

Answer: B) 84 mts Explanation: Vol of silver = πR2h  = 66 C.C   Given D= 1mm => R = D/2 = 1/20 cm     => 227×1202×h = 66 = 66 x 400 x (7/22) = 8400 cm = 84 mtrs.

Q: Who translated Mahabharata into Persian? 2428 0

  • 1
    Jahangir
    Correct
    Wrong
  • 2
    Aurangzeb
    Correct
    Wrong
  • 3
    Akbar
    Correct
    Wrong
  • 4
    Shahjahan
    Correct
    Wrong
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Answer : 3. "Akbar"
Explanation :

Answer: C) Akbar Explanation: The Mahabharata was translated into Persian at Akbar’s orders, by Faizi and 'Abd al-Qadir Bada' uni (c. 1540 – 1615) and named Razmnameh.

Q: What has Hands But cannot Clap? 2428 0

  • 1
    Toy
    Correct
    Wrong
  • 2
    Clock
    Correct
    Wrong
  • 3
    Bag
    Correct
    Wrong
  • 4
    Shirt
    Correct
    Wrong
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Answer : 2. "Clock"
Explanation :

Answer: B) Clock Explanation: What has Hands But cannot Clap is a Clock or a Watch. A Clock technically has 3 hands. 1 Hour Hand Which tells Hours 1 Minute Hand Which tells Minutes 1 Second Hand Which tells Seconds. But cannot clap with these hands.

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Answer : 1. "99"
Explanation :

Answer: A) 99 Explanation: Let, Distance between A and B = d   Distance travelled by P while it meets Q = d + 11   Distance travelled by Q while it meets P = d – 11   Distance travelled by Q while it meets R = d + 9   Distance travelled by R while it meets Q = d – 9   Here the ratio of speeds of P & Q => SP : SQ = d + 11 : d – 11   The ratio of speeds of Q & R => SQ : SR = d + 9 : d – 9   But given Ratio of speeds of P & R => P : R = 3 : 2  SPSR = SPSQxSQSR = d+11d+9d-11d-9   => d+11d+9d-11d-9 = 3/2   =>  d = 1, 99   => d = 99 satisfies.   Therefore, Distance between A and B = 99

Q: Is rusting a physical or chemical change? 2424 0

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Answer :
Explanation :

In chemistry rusting is called as oxidation. Oxidation is a chemical process where metal gains oxygen and become oxide. In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust. The rusting of iron is a chemical change because it is two substances reacting together to make a new substance.    Rusting would only be a physical change if iron molecules remained pure iron throughout the process.

Q: Two bottles contains mixture of milk and water. First bottle contains 64% milk and second bottle contains 26% water. In what ratio these two mixtures are mixed so that new mixture contains 68% milk? 2422 0

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

Answer: A) 3 : 2 Explanation: % of milk in first bottle = 64% % of milk in second bottle = 100 - 26 = 74% Now, ATQ   64%            74%                   68%   6                    4   Hence, by using allegation method,   Required ratio = 3 : 2

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