IIT JEE Practice Question and Answer

Q: How many seconds in 10 years? 2204 0

  • 1
    31523500 sec
    Correct
    Wrong
  • 2
    315360000 sec
    Correct
    Wrong
  • 3
    315423000 sec
    Correct
    Wrong
  • 4
    315354000 sec
    Correct
    Wrong
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Answer : 2. "315360000 sec"
Explanation :

Answer: B) 315360000 sec Explanation: We know that, 1 year = 365 days 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds.   Then, 1 year = 365 x 24 x 60 x 60 seconds. = 8760 x 3600 1 year = 31536000 seconds.   Hence, 10 years = 31536000 x 10 = 315360000 seconds.

Q: A store owner is packing books into larger boxes that measure 25 by 42 by 60 inches. If the measurement of each book is 7 by 6 by 5 inches, then how many books can be placed in the box ? 2203 0

  • 1
    175
    Correct
    Wrong
  • 2
    345
    Correct
    Wrong
  • 3
    265
    Correct
    Wrong
  • 4
    300
    Correct
    Wrong
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Answer : 4. "300"
Explanation :

Answer: D) 300 Explanation: Number of books that can be placed in the larger box is given by Volume of Box / Volume of book.Now, n = 25 x 42 x 60 / 7 x 6 x 5 = 63000 / 210 = 300.Therefore, 300 books can be in that box.

Q: One girl can eat 112 chocolates in half a minute, and her boy friend can eat half as many in twice the length of time. How many chocolates can both boy and girl eat in 12 seconds ? 2203 0

  • 1
    44
    Correct
    Wrong
  • 2
    32
    Correct
    Wrong
  • 3
    56
    Correct
    Wrong
  • 4
    49
    Correct
    Wrong
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Answer : 3. "56"
Explanation :

Answer: C) 56 Explanation: Girl eats 112 chocolates in 30 sec so she can eat in 12 sec is 12 x 112/30 = 44.8 chocolates.   Her boy friend can eat one-half of 112 in twice of 30 sec so he can eat 56 in 60 sec Then he can eat in 12 sec is 56 x 12/60 = 11.2 chocolates.   Hence, together they can eat = 44.8 + 11.2 =56 chocolates in 12 seconds.

Q: Solve the Riddle? 2202 0

  • 1
    79 hrs
    Correct
    Wrong
  • 2
    72 hrs
    Correct
    Wrong
  • 3
    52 hrs
    Correct
    Wrong
  • 4
    18 hrs
    Correct
    Wrong
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Answer : 4. "18 hrs"
Explanation :

Answer: D) 18 hrs Explanation: From the given data, 18 snakes can eat 18 bananas in 18 hrs. => 1 snake can eat 1 banana in 18 hrs => 79 snakes can eat 79 bananas in 18 hrs.   Hence, 18 hrs.

Q: Today is Varun's birthday. One year, from today he will be twice as old as he was 12 years ago. How old is Varun today ? 2201 0

  • 1
    25 years
    Correct
    Wrong
  • 2
    24 years
    Correct
    Wrong
  • 3
    23 years
    Correct
    Wrong
  • 4
    22 years
    Correct
    Wrong
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Answer : 1. "25 years"
Explanation :

Answer: A) 25 years Explanation: Let varun's age = x yrs. From the given conditions, x+1  =  2(x-12) x = 25 years.

Q: If Theresa's daughter is my daughter's mother, what am I to Theresa? 2199 0

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

Answer: A) Son-in-law Explanation: Given that If Theresa's daughter is my daughter's mother It has 2 ways of Answers such that it depends on the sex of me. That is Male or Female.   1) If I am a Male : My daughter's mother is my wife. My wife is Teresa's daughter => I am Teresa's Son-in-law.   2) If I am a Female : My daughter's mother is myself. Myself Teresa's daughter. => I am Teresa's Daughter.   But in the given options only Son-in-law is available and daughter is not given.   So, Son-in-law is correct.

Q: What loses its head every morning and gets it back every night? 2198 0

  • 1
    Pillow
    Correct
    Wrong
  • 2
    Candle
    Correct
    Wrong
  • 3
    Moon
    Correct
    Wrong
  • 4
    Light
    Correct
    Wrong
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Answer : 1. "Pillow"
Explanation :

Answer: A) Pillow Explanation:

Q: Vishal invested 10% more than Trishul. Trishul invested 10% less than Raghu. If the total sum of their investments is Rs. 5780, how much amount did Raghu invest ? 2197 0

  • 1
    Rs.2010
    Correct
    Wrong
  • 2
    Rs.2200
    Correct
    Wrong
  • 3
    Rs.2000
    Correct
    Wrong
  • 4
    Rs.2100
    Correct
    Wrong
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Answer : 3. "Rs.2000"
Explanation :

Answer: C) Rs.2000 Explanation: Let money invested by Raghu = Rs. xMoney invested by Trishul = 9/10 x = 0.9xMoney invested by Vishal = 9/10x * 110/100 = 0.99xAlso, x+0.9x+0.99x = 5780= x= 5780/2.89 = 2000 Therefore, amount invested by Raghu is Rs. 2000.

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