IIT JEE Practice Question and Answer

Q: A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present ? 1652 0

  • 1
    36 yrs
    Correct
    Wrong
  • 2
    38 yrs
    Correct
    Wrong
  • 3
    40 yrs
    Correct
    Wrong
  • 4
    42 yrs
    Correct
    Wrong
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Answer : 3. "40 yrs"
Explanation :

Answer: C) 40 yrs Explanation: Let the mother's present age be x years. Then, the person's present age = 2/5 x years. (2x/5 + 8) = 1/2 (x + 8) 2(2x + 40) = 5(x + 8) => x = 40.

Q: With which Bank Google has tied up for its mobile payments app Tez? 1652 0

  • 1
    SBI Bank
    Correct
    Wrong
  • 2
    Axis Bank
    Correct
    Wrong
  • 3
    HDFC Bank
    Correct
    Wrong
  • 4
    PNB Bank
    Correct
    Wrong
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Answer : 1. "SBI Bank"
Explanation :

Answer: A) SBI Bank Explanation: Internet giant Google has tied up with State Bank of India (SBI) for its mobile payments app Tez. Through this partnership, Google Tez will allow users to create an SBI UPI Id - @oksbi and get access.

Q: The Gas used for Artificial Ripening of Green Fruit is 1652 0

  • 1
    Acetone
    Correct
    Wrong
  • 2
    Di Carbonate
    Correct
    Wrong
  • 3
    Ethylene
    Correct
    Wrong
  • 4
    Ethyl Alcohol
    Correct
    Wrong
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Answer : 3. "Ethylene"
Explanation :

Answer: C) Ethylene Explanation: Ethylene is used for Artificial Ripening of Green Fruit. Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in its effects to the natural ripening agent, ethylene

Q: A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ? 1651 0

  • 1
    3 hrs
    Correct
    Wrong
  • 2
    6 hrs
    Correct
    Wrong
  • 3
    7 hrs
    Correct
    Wrong
  • 4
    5 hrs
    Correct
    Wrong
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Answer : 2. "6 hrs"
Explanation :

Answer: B) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work. Then, (1/x + 2/x + 3/x) = 1/2 6/x = 1/2 => x = 12 So, B takes 6 hours to finish the work.

Q: The capacity of a water heater is measured in 1651 0

  • 1
    Gallons
    Correct
    Wrong
  • 2
    Liters
    Correct
    Wrong
  • 3
    Meters
    Correct
    Wrong
  • 4
    Both A & B
    Correct
    Wrong
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Answer : 4. "Both A & B"
Explanation :

Answer: D) Both A & B Explanation: The capacity of a water heater is measured in Gallons or Liters. In the USA, it is measured in Gallons and in India, we measure it in Liters. Hence, if the capacity of the water heater is 15 gallons or 15 liters, then it says that it can hold 15 gallons or 15 liters of water.

Q: Priya can do a work in 16 days. In how many days will the work be completed by Sai, if the efficiency of Sai is 60% more than that of Priya ? 1650 0

  • 1
    8 days
    Correct
    Wrong
  • 2
    12 days
    Correct
    Wrong
  • 3
    14 days
    Correct
    Wrong
  • 4
    10 days
    Correct
    Wrong
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Answer : 4. "10 days"
Explanation :

Answer: D) 10 days Explanation: Ratio of efficiencies of Priya and Sai is Sai : Priya = 160 : 100 = 8 : 5 Given Priya completes the work in 16 days Let number of days Sai completes the work be 'd' => 5×16 = 8×d d = 10 days. Therefore, number of days Sai completes the work is 10 days.

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Answer :
Explanation :

Out of 4 fruits, any 3 are chosen by 4 families.So the combinations areApple - A Cherries - C Banana - B Grapes - G1) ACB2) ACG3) BCG4) GAB By 2nd condition, Miller family uses either i)ACB or ii)ACGNow we have Robin, Mandy and Miller who uses apples (ACB,ACG,GAB)while Miller and Mandy both uses A and C. That leaves GAB for Robin. By 3rd condition Flure uses either C or G. So if we leave out the terms containing both C and G, we are left with ACB and GAB Now, for the time being let's suppose Robin is not a Flure.So ACB is taken by Flure. So ACG has to be Miller and that leaves BCG to be Clark. So we get Robin - Jacob(GAB). By 4th and 2nd conditions Erica and Mandy belong to the first two. That leaves Stacy - Clark(BCG). By 2nd condition Mandy is not a Miller, so we get Mandy - Flure(ACB) and that leaves Erica - Miller(ACG).

Q: Which of the following became widespread during the 1980's? 1650 0

  • 1
    Internet
    Correct
    Wrong
  • 2
    Radio
    Correct
    Wrong
  • 3
    Cable television
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 3. "Cable television"
Explanation :

Answer: C) Cable television Explanation: Cable television or cable TV became widespread during the 1980's.

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