IIT JEE Practice Question and Answer

Q: What is the value of KL ? Statement A: K2= 4.Statement B: L = 0. 1591 0

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    Only A is sufficient
    Correct
    Wrong
  • 2
    Only B is sufficient
    Correct
    Wrong
  • 3
    Both (A) and (B) are sufficient
    Correct
    Wrong
  • 4
    A) and (B) are sufficient D)
    Correct
    Wrong
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Answer : 2. "Only B is sufficient"
Explanation :

Answer: B) Only B is sufficient Explanation: From statement B,  As the value of L = 0, the value of KL = 0. Hence only statement B is sufficient.

Q: A sum is equally invested in two different schemes on CI at the rate of 15% and 20% for two years. If interest gained from the sum invested at 20% is Rs. 528.75 more than the sum invested at 15%, find the total sum? 1591 0

  • 1
    Rs. 7000
    Correct
    Wrong
  • 2
    Rs. 4500
    Correct
    Wrong
  • 3
    Rs. 9000
    Correct
    Wrong
  • 4
    Rs. 8200
    Correct
    Wrong
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Answer : 3. "Rs. 9000"
Explanation :

Answer: C) Rs. 9000 Explanation: Let Rs. K invested in each scheme Two years C.I on 20% = 20 + 20 + 20x20/100 = 44% Two years C.I on 15% = 15 + 15 + 15x15/100 = 32.25% Now, (P x 44/100) - (P x 32.25/100) = 528.75 => 11.75 P = 52875 => P = Rs. 4500   Hence, total invested money = P + P = 4500 + 4500 = Rs. 9000.

Q: Manideep purchases 30kg of barley at the rate of 11.50/kg and 20kg at the rate of 14.25/kg. He mixed the two and sold the mixture in the shop. At what price per kg should he sell the mixture to make 30% profit to him ? 1590 0

  • 1
    15.84
    Correct
    Wrong
  • 2
    14.92
    Correct
    Wrong
  • 3
    13.98
    Correct
    Wrong
  • 4
    16.38
    Correct
    Wrong
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Answer : 4. "16.38"
Explanation :

Answer: D) 16.38 Explanation: Given, Manideep purchases 30kg of barley at the rate of 11.50/kg nad 20kg at the rate of 14.25/kg. Total cost of the mixture of barley = (30 x 11.50) + (20 x 14.25) => Total cost of the mixture = Rs. 630 Total kgs of the mixture = 30 + 20 = 50kg Cost of mixture/kg = 630/50 = 12.6/kg To make 30% of profit => Selling price for manideep = 12.6 + 30% x 12.6 => Selling price for manideep = 12.6 + 3.78 = 16.38/kg.

Q: Three unbiased coins are tossed. What is the probability of getting at most two heads ? 1589 0

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

Answer: D) 3/4 Explanation: Let S be the sample space.Here n(S)= 23 = 8Let E be the event of getting atmost two heads. Then,n(E) = {(H,T,T), (T,H,T), (T,T,H), (H,H,T), (T,H,H), (H,T,H)}Required probability = n(E)/n(S) = 6/8 = 3/4.

Q: What is the Capital city of Peru? 1589 0

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    Sucre
    Correct
    Wrong
  • 2
    Manama
    Correct
    Wrong
  • 3
    Lima
    Correct
    Wrong
  • 4
    Bogota
    Correct
    Wrong
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Answer : 3. "Lima"
Explanation :

Answer: C) Lima Explanation: Lima is the Capital of Peru and its Currency is Sol.

Q: What is common between Aerobic and Anaerobic Respiration? 1589 0

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    Krebs cycle
    Correct
    Wrong
  • 2
    Glycolysis
    Correct
    Wrong
  • 3
    Electron transport chain
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 2. "Glycolysis"
Explanation :

Answer: B) Glycolysis Explanation: Glycolysis is common between Aerobic and Anaerobic Respiration.   Cellular respiration is the process by which glucose is broken down to form ATP molecules, which act as carriers of cellular energy. The first phase is called glycolysis and is common to both aerobic (respiration in the presence of oxygen) and anaerobic (respiration in the absence of oxygen) respiration.   During glycolysis, glucose is split to forms two pyruvate molecules and 2 molecules of ATP. This occurs in the cytoplasm of the cell.   If oxygen in present, the pyruvate molecules will be used in the Krebs cycle, to yield more ATP molecules. If oxygen is absent, the pyruvate is converted into lactic acid, or ethanol and carbon dioxide, in animals or plants, respectively.

Q: ______ is the first state to have Logo for Vehicles Driven by person with Hearing Impairment ? 1589 0

  • 1
    Telangana
    Correct
    Wrong
  • 2
    Rajasthan
    Correct
    Wrong
  • 3
    Gujarat
    Correct
    Wrong
  • 4
    Haryana
    Correct
    Wrong
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Answer : 1. "Telangana"
Explanation :

Answer: A) Telangana Explanation: Telangana has introduced a logo for identifying vehicles driven by persons with hearing impairment and has become the first state in the country to do so. The logo was designed by city-based graphic designer Manikanta Annapragada who was the first person to obtain a driving licence under the ‘hearing impaired’ category in the country. The logo consists of a hearing impaired mark along with text saying, “Driver is deaf — Please watch out”.

Q: What is 15 of 80 with simple method and examples? 1589 0

  • 1
    12.5%
    Correct
    Wrong
  • 2
    18.75%
    Correct
    Wrong
  • 3
    16.55%
    Correct
    Wrong
  • 4
    17.80%
    Correct
    Wrong
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Answer : 2. "18.75%"
Explanation :

Answer: B) 18.75% Explanation: Given that to find 15 of 80 => What % of 80 is 15 Let it be 'p' => p% of 80 = 15 => p x 80100 = 15⇒p = 15 x 10080⇒p = 150080 = 18.75   Therefore, 15 is 18.75% of 80 => 18.75% of 80 = 15   Example:: Now, in the similar way we can find 15% of 80 =? => 15x80/100 = p => p = 4 x 3 = 12   Therefore, 15% of 80 = 12

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