IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Find the ODD number ? 1641 0

  • 1
    42
    सही
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  • 2
    142
    सही
    गलत
  • 3
    119
    सही
    गलत
  • 4
    21
    सही
    गलत
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उत्तर : 2. "142"
व्याख्या :

Answer: B) 142 Explanation: Except 142 all are divisible by number '7'.

प्र: What is the functional unit of a skeletal muscle called? 1641 0

  • 1
    Myofibril
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  • 2
    Sarcomere
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  • 3
    Fiber
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  • 4
    Fasciculus
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उत्तर : 2. "Sarcomere"
व्याख्या :

Answer: B) Sarcomere Explanation: The myofibrils are composed of actin and myosin filaments, repeated in units called sarcomeres, which are the basic functional units of the skeletal muscle.

प्र: Who invented Bifocal Lens? 1641 0

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    John Adams
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  • 2
    Benjamin Franklin
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  • 3
    James Madison
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  • 4
    Thomas Jefferson
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उत्तर : 2. "Benjamin Franklin"
व्याख्या :

Answer: B) Benjamin Franklin Explanation: Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

प्र: If the average height of boys in a hall is 180 cm and that of girls is 150 cm. If the average height of the gathering is 165 cm, then find the number of girls present in the hall if the number of boys present in the hall are 78 ? 1641 0

  • 1
    56
    सही
    गलत
  • 2
    64
    सही
    गलत
  • 3
    87
    सही
    गलत
  • 4
    78
    सही
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उत्तर : 4. "78"
व्याख्या :

Answer: D) 78 Explanation: Using Trial and error method, we get the number of girls in the hall = 78

प्र: " Rani ki Vav " an archaeological attraction is located in which of the following states ? 1641 0

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    Andhra Pradesh
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  • 2
    Telangana
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  • 3
    Rajasthan
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  • 4
    Gujarat
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उत्तर : 4. "Gujarat"
व्याख्या :

Answer: D) Gujarat Explanation: Rani ki Vav meaning the Queen’s Stepwell is an archaeological site in the state of Gujarat. Beauitfully structured, the site has been included in the list of international heritage sites by UNESCO. With the help of the ambitious project, The Scottish Ten, Rani ki Vav is among the five heritage sites that would be recreated digitally for managment and conservation.

प्र: In an exhibition, Almond bought a painting for Rs. 20000. He later sold it to Olive for Rs. 23000. Olive sold it to Sarah for double the profit percentage that Almond earned. At what price should Sarah sell this painting to earn 8% profit ? 1640 0

  • 1
    Rs. 34,410
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  • 2
    Rs. 31,184
    सही
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  • 3
    Rs. 29,999
    सही
    गलत
  • 4
    Rs. 32,292
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उत्तर : 4. "Rs. 32,292"
व्याख्या :

Answer: D) Rs. 32,292 Explanation: Almond Selling price = CP(1 + P%/100) => CP = 20000, SP = 23000 => 23000 = 20000 (1 + P/100) => P% = 100(23000/20000 - 1) = 15 Then, Olive's P% = 30% SP for Olive = CP for Sarah = 23000(1 + 30/100) = 29900 Now Sarah wants to earn profit of 8% => Sp for Sarah = 29900(1 + 8/100) = Rs. 32,292.

प्र: The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased  ? 1640 0

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    90%
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  • 2
    88%
    सही
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  • 3
    85%
    सही
    गलत
  • 4
    84%
    सही
    गलत
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उत्तर : 1. "90%"
व्याख्या :

Answer: A) 90% Explanation: Let length, breadth and height of the room be 7, 3, 1 unit respectively. Area of walls = 2(l+b)xh = 2(7+3)x1 = 20 sq. unit. Now, length, breadth and height of room will become 3.5, 6 and 2 respectively.  Area of walls = 2(l+b)xh = 2(3.5+6)x2 = 38 sq. unit.  % Increase in the area of walls = (38-20)x100/20 = 90%.

प्र: Which of the Phrases (1), (2), (3) and (4) given below should replace the phrases printed in bold in the sentence to make it grammatically correct.    They claim that their employees are highly committing and disciplined. 1640 0

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    Have been highly committed
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  • 2
    Have high commitments
    सही
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  • 3
    Are highly committed
    सही
    गलत
  • 4
    No correction required
    सही
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उत्तर : 3. "Are highly committed"
व्याख्या :

Answer: C) Are highly committed Explanation: As per the rule of adverb, the adverb is followed by the third form of verb.

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