IIT JEE Practice Question and Answer

Q: A man reads 3/7 of a book on a day and 2/5 of the remaining, on the second day. If the number of pages still unread are 36, how many pages did the book contain ? 1468 0

  • 1
    105
    Correct
    Wrong
  • 2
    101
    Correct
    Wrong
  • 3
    98
    Correct
    Wrong
  • 4
    109
    Correct
    Wrong
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Answer : 1. "105"
Explanation :

Answer: A) 105 Explanation: Let number of pages in a book = p According to questions p - [3p/7 + (2/5 x 4p/7)] = 36 = p - 23p/35 = 36 => 12p = 36 × 35 p = 105

Q: Plant cell walls consist mainly of 1468 0

  • 1
    Chitin
    Correct
    Wrong
  • 2
    peptidoglycan
    Correct
    Wrong
  • 3
    cellulose
    Correct
    Wrong
  • 4
    chlorophyll
    Correct
    Wrong
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Answer : 3. "cellulose"
Explanation :

Answer: C) cellulose Explanation: Plant cell walls are mostly made up of the molecule cellulose. Cellulose is a polysaccharide, a complex sugar made of long chains of glucose.   The cell wall must be made of thick and strong material as it provides the structural shape of the plant and protection from insects and microorganisms.

Q: Find the total numbers greater than 4000 that can be formed with digits 2, 3, 4, 5, 6 no digit being repeated in any number ? 1467 0

  • 1
    120
    Correct
    Wrong
  • 2
    256
    Correct
    Wrong
  • 3
    192
    Correct
    Wrong
  • 4
    244
    Correct
    Wrong
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Answer : 3. "192"
Explanation :

Answer: C) 192 Explanation: We are having with digits 2, 3, 4, 5 & 6 and numbers greater than 4000 are to be formed, no digit is repeated.   The number can be 4 digited but greater than 4000 or 5 digited.   Number of 4 digited numbers greater than 4000 are4 or 5 or 6 can occupy thousand place => 3 x P34 = 3 x 24 = 72.    5 digited numbers = P55 = 5! = 120  So the total numbers greater than 4000 = 72 + 120 = 192

Q: In how many different ways can the letters of the word 'HAPPYHOLI' be arranged? 1467 0

  • 1
    89,972
    Correct
    Wrong
  • 2
    90,720
    Correct
    Wrong
  • 3
    72,000
    Correct
    Wrong
  • 4
    81,000
    Correct
    Wrong
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Answer : 2. "90,720"
Explanation :

Answer: B) 90,720 Explanation: The given word HAPPYHOLI has 9 letters These 9 letters can e arranged in 9! ways. But here in the given word letters H & P are repeated twice each Therefore, Number of ways these 9 letters can be arranged is  9!2! x 2! = 9 x 8 x 7 x 6 x 5 x 4 x 32 = 90,720 ways.

Q: Which of the following is not a monosaccharide? 1466 0

  • 1
    Fructose
    Correct
    Wrong
  • 2
    Glucose
    Correct
    Wrong
  • 3
    Galactose
    Correct
    Wrong
  • 4
    Sucrose
    Correct
    Wrong
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Answer : 4. "Sucrose"
Explanation :

Answer: D) Sucrose Explanation: Sucrose is not a monosaccharide.   Monosaccharides are simple carbohydrates molecules that cannot be broken down into smaller molecules of other carbohydrates.   Glucose, galactose and fructose are examples of Monosaccharides.

Q: How many periods in National Hockey League? 1466 0

  • 1
    2
    Correct
    Wrong
  • 2
    3
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 2. "3"
Explanation :

Answer: B) 3 Explanation: National Hockey League game is divide into 3 Periods each of 20 minutes. During the regular season, if the game ends in a tie, a 5 minute, sudden death overtime is played. In the playoffs, the overtime is 20 minutes long.

Q: The yield to maturity on a discount bond is 1466 0

  • 1
    equal to both the coupon rate / current yeild
    Correct
    Wrong
  • 2
    less than the current yeild but greater than the coupon rate
    Correct
    Wrong
  • 3
    greater than both the coupon rate / current yeild
    Correct
    Wrong
  • 4
    equal to the current yeild but greater than the coupon rate
    Correct
    Wrong
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Answer : 1. "equal to both the coupon rate / current yeild"
Explanation :

Answer: A) equal to both the coupon rate / current yeild Explanation: Yield to maturity is a concept for fixed rate bonds and is the internal rate of return i.e. the rate at which future flows are discounted on a compound basis to give the present value of the bond including accrued interest.

Q: "World Television Day" is observed every year on ___. 1465 0

  • 1
    Nov 21
    Correct
    Wrong
  • 2
    Oct 22
    Correct
    Wrong
  • 3
    Sep 23
    Correct
    Wrong
  • 4
    Aug 24
    Correct
    Wrong
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Answer : 1. "Nov 21"
Explanation :

Answer: A) Nov 21 Explanation:

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