IIT JEE Practice Question and Answer

Q: What is something you will never see again? 1263 0

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Answer :
Explanation :

Yesterday, is what we will never see again as the time we come across will never be back.

Q: Which state has ranked top among the states in the country in terms of manufacturing excellence in 2017 ? 1262 0

  • 1
    Telangana
    Correct
    Wrong
  • 2
    Tamilnadu
    Correct
    Wrong
  • 3
    Haryana
    Correct
    Wrong
  • 4
    Karnataka
    Correct
    Wrong
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Answer : 4. "Karnataka"
Explanation :

Answer: D) Karnataka Explanation: Southern state Karnataka has been ranked top among the states in the country in terms of manufacturing excellence, according to a study by apex industry body Assocham in 2017.

Q: As per the decision of the GST Council, e-Way Bill system has been rolled out from 1262 0

  • 1
    1st March 2018
    Correct
    Wrong
  • 2
    1st April 2018
    Correct
    Wrong
  • 3
    1st May 2018
    Correct
    Wrong
  • 4
    1st January 2018
    Correct
    Wrong
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Answer : 2. "1st April 2018"
Explanation :

Answer: B) 1st April 2018 Explanation: As per the decision of the GST Council, e-Way Bill system has been rolled out from 1st of April this year (2018).

Q: What is the difference between the number of uneducated females in city P and that of uneducated males in city S ? 1261 0

  • 1
    9 lakhs
    Correct
    Wrong
  • 2
    6 lakhs
    Correct
    Wrong
  • 3
    3 lakhs
    Correct
    Wrong
  • 4
    2 lakhs
    Correct
    Wrong
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Answer : 1. "9 lakhs"
Explanation :

Answer: A) 9 lakhs Explanation: Educated females in city P = 25 lakhs Uneducated females in city P = 30 - 25 = 5 lakhs Educated males city S = 21 lakhs Educated males in city S = 35 - 21= 14 lakhs Required difference = 14 - 5 = 9 lakhs

Q: Which of the following is a polymer? 1261 0

  • 1
    Glycerol
    Correct
    Wrong
  • 2
    Amino acid
    Correct
    Wrong
  • 3
    Nucleic acid
    Correct
    Wrong
  • 4
    Fatty acid
    Correct
    Wrong
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Answer : 3. "Nucleic acid"
Explanation :

Answer: C) Nucleic acid Explanation: Nucleic acid is a polymer among the given options.

Q: One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn find the probability the card drawn is red. 1259 0

  • 1
    2/3
    Correct
    Wrong
  • 2
    1/2
    Correct
    Wrong
  • 3
    1/52
    Correct
    Wrong
  • 4
    13/51
    Correct
    Wrong
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Answer : 2. "1/2"
Explanation :

Answer: B) 1/2 Explanation: We know that: When one card is drawn from a pack of 52 cards The numbers of possible outcomes n(s) = 52 We know that there are 26 red cards in the pack of 52 cards⇒ The numbers of favorable outcomes n(E) = 26 Probability of occurrence of an event: P(E)=Number of favorable outcomes/Numeber of possible outcomes=n(E)/n(S) ∴ required probability = 26/52 = 1/2.

Q: Train K crosses a stationary Train L in 50 seconds and a pole in 20 seconds with the same speed. The length of the Train K is 240 meters. What is the length of stationary Train L ? 1259 0

  • 1
    60 mts
    Correct
    Wrong
  • 2
    120 mts
    Correct
    Wrong
  • 3
    240 mts
    Correct
    Wrong
  • 4
    360 mts
    Correct
    Wrong
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Answer : 4. "360 mts"
Explanation :

Answer: D) 360 mts Explanation: Speed of the Train K is given by s = d/t = 240/20 = 12 m/sDistance covered by Train K in 50 seconds = 12 x 50 = 600 mts.But it crosses Train L in 50 seconds Therefore, the length of the Train L is = 600 - 240 = 360 mts.

Q: In the following number series, one of the numbers is wrong. Find it out? 77, 79, 76, 81, 75, 85 1259 0

  • 1
    79
    Correct
    Wrong
  • 2
    81
    Correct
    Wrong
  • 3
    75
    Correct
    Wrong
  • 4
    85
    Correct
    Wrong
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Answer : 3. "75"
Explanation :

Answer: C) 75 Explanation: Here in the given series, it follows a pattern that   77 + 2 = 79   79  - 3 = 76   76 + 5 = 81   81 -  7 = 74   74 + 11 = 85   Consecutive adding and subtracting of prime numbers.   So the wrong number in the given series is 75.

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