IIT JEE Practice Question and Answer

Q: What is the main function of an ignition safety switch? 1723 0

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Answer :
Explanation :

An ignition safety switch is a safety device can shut off the engine if the operator falls off the PWC or out of the powerboat, or is otherwise thrown from the proper operating position.   How it works: It allows the engine of the vehicle to shut off or to be turned off immediately as it is to prevent further complications to happen as this is being used when an emergency is launched   Where it is used: Most powerboats and PWCs come equipped by the manufacturer with an emergency engine cut-off switch.

Q: A is the father of B. But B is not the son of A. Then what is B to A? 1723 0

  • 1
    Grandfather
    Correct
    Wrong
  • 2
    Son-in-law
    Correct
    Wrong
  • 3
    Granddaughter
    Correct
    Wrong
  • 4
    Daughter
    Correct
    Wrong
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Answer : 4. "Daughter"
Explanation :

Answer: D) Daughter Explanation: The relation is father and daughter. As we go with male gender, will be son of A. But it is given in the question that B is not the son of A. Hence, te only possile is B is female and B is daughter of A.

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 ? 1722 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: A shopkeeper who deals in books sold a book at 16% loss. Had she charged an additional Rs.60 while selling it , her profit would have been 14%. Find the cost price, in rupees, of the book ? 1722 0

  • 1
    Rs. 185
    Correct
    Wrong
  • 2
    Rs. 154
    Correct
    Wrong
  • 3
    Rs. 200
    Correct
    Wrong
  • 4
    Rs. 177
    Correct
    Wrong
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Answer : 3. "Rs. 200"
Explanation :

Answer: C) Rs. 200 Explanation: Let the C.P be 'x'Then, the selling price S.P = x - 16x/100= 84x/100 = 21x/25Now, if the S.P is 60 more, then the profit is 14% => 21x/25 + 60 = x + 14x/100=> 114x/100 - 21x/25 = 60=> (57 - 42)x/50 = 60=> 15x/50 = 60x = 3000/15 = 200 Therefore, the Cost price C.P = x = Rs. 200

Q: The former cricketer/cricketers who was/were inducted into the ICC Cricket Hall of Fame 2018 in Dublin, Ireland 1721 0

  • 1
    Claire Taylor
    Correct
    Wrong
  • 2
    Ricky Ponting
    Correct
    Wrong
  • 3
    Rahul Dravid
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation: Former captains Rahul Dravid of India, Ricky Ponting of Australia and retired England Women wicketkeeper-batter Claire Taylor were inducted into the ICC Cricket Hall of Fame 2018 during a glittering ceremony in Dublin, Ireland.   Former Team India captain Rahul Dravid has become the fifth Indian cricketer after Anil Kumble, Sunil Gavaskar, Bishan Singh Bedi and Kapil Dev to be inducted into the ICC Hall of Fame.

Q: A person lends Rs. 1540 for five years and Rs. 1800 for four years. If he gets Rs. 1788 as interest on both amounts, what is the rate of interest ? 1720 0

  • 1
    14.5%
    Correct
    Wrong
  • 2
    11%
    Correct
    Wrong
  • 3
    12%
    Correct
    Wrong
  • 4
    10.5%
    Correct
    Wrong
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Answer : 3. "12%"
Explanation :

Answer: C) 12% Explanation: Let the interest rate be r% We know that, S.I = PTR/100 => (1540 x 5 x r)/100  +  (1800 x 4 x r)/100 = 1788 => r = 178800/14900 = 12%

Q: Which party has announced that the party is quitting from the BJP-Led NDA Alliance at the center? 1720 0

  • 1
    Shiv Sena
    Correct
    Wrong
  • 2
    Telugu Desham Party
    Correct
    Wrong
  • 3
    Lok Janshakti Party
    Correct
    Wrong
  • 4
    Janata Dal United
    Correct
    Wrong
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Answer : 2. "Telugu Desham Party"
Explanation :

Answer: B) Telugu Desham Party Explanation: Andhra Pradesh's TDP - Telugu Desam Party, today i.e on 16th March 2018 quit the NDA government at the Centre a week after two of its ministers resigned from the Union cabinet over the issue of special status for Andhra Pradesh.

Q: How many black cards are in a deck? 1720 0

  • 1
    13
    Correct
    Wrong
  • 2
    26
    Correct
    Wrong
  • 3
    39
    Correct
    Wrong
  • 4
    52
    Correct
    Wrong
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Answer : 2. "26"
Explanation :

Answer: B) 26 Explanation: The total cards in the deck are 52. These 52 cards are divided into 4 suits of 13 cards in each suit. Two Red suits and Two black suits. Red suits :: Heart suit and Diamond suit = 26 Black suits :: Spade suit and Club suit = 26.

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