IIT JEE Practice Question and Answer

Q: Sumanth walks 200 feet straight from his house, which is facing north and then he walks 100 feet in reverse direction.Further he takes a left turn and walks 300 yards.In Which direction is Sumanth now from his original position? 2011 0

  • 1
    South-East
    Correct
    Wrong
  • 2
    North-East
    Correct
    Wrong
  • 3
    South-West
    Correct
    Wrong
  • 4
    North-West
    Correct
    Wrong
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Answer : 2. "North-East"
Explanation :

Answer: B) North-East Explanation: Starting From his house, Sumanth walks 200 feet straight towards North; we can write it as N200. Similarly, the other distances and directions can be considered and written as follows : (Notice that he covers 300 yards towards East; one yard = 3 feet and hence 300 yards = 900 feet)  N200S100E900 Adding all south and all North distances and finding the net result, and also adding all East and all West distances and finding the net result, this can further be summarized as : N100E900  Thus, the direction from his original position is North-East.

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 ? 2011 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.

Q: How many balls? Number of balls in the figure... 2011 0

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Answer :
Explanation :

You have to actually count all the balls in the pyramid.Simple way is to count the balls in each level. So lower most level lets say 1st level has 4 x 4 balls; i.e. 16 ballsSimilarly 2nd level has 3 x 3 balls; i.e. 9 balls.3rd level has 2 x 2 balls; i.e. 4 balls.The top most level has just 1 ball. So the total number of balls is 16+9+4+1 = 30.   So the image has 30 Balls in all.

Q: What goes up when rain comes down? 2010 0

  • 1
    Air
    Correct
    Wrong
  • 2
    Heat
    Correct
    Wrong
  • 3
    Umbrella
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "Umbrella"
Explanation :

Answer: C) Umbrella Explanation: Yes, when rain starts falling umbrella goes up for pretecting us from wetting.

Q: Q's mother is sister of P and daughter of M who is brother of R. S is daughter of P and sister of T. How is M related to T ? 2008 0

  • 1
    Grand father
    Correct
    Wrong
  • 2
    Grand mother
    Correct
    Wrong
  • 3
    Grand father or Grand mother
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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Answer : 1. "Grand father"
Explanation :

Answer: A) Grand father Explanation: Q's mother is sister of P and daughter of M => P is the child of M.S is daughter of P and sister of T, so P is parent of T too.M ----> parent --------> P ------------>parent -------------> TBut given M is brother of R => M is male. So, M is grandfather of T.

Q: Chemical name of Gold? 2008 0

  • 1
    Argentinum
    Correct
    Wrong
  • 2
    Ferrus
    Correct
    Wrong
  • 3
    Aurum
    Correct
    Wrong
  • 4
    Selenium
    Correct
    Wrong
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Answer : 3. "Aurum"
Explanation :

Answer: C) Aurum Explanation: The Chemical name of Gold is Aurum with symbol Au with atomic number 79 and a group 11 element. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal.

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 ? 2008 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: K and L starts walking towards each other at 4 pm at speed of 3 km/hr and 4 km/hr respectively. They were initially 17.5 km apart. At what time do they meet ? 2007 0

  • 1
    6:00 am
    Correct
    Wrong
  • 2
    6:30 pm
    Correct
    Wrong
  • 3
    5:45 am
    Correct
    Wrong
  • 4
    5:52 pm
    Correct
    Wrong
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Answer : 2. "6:30 pm"
Explanation :

Answer: B) 6:30 pm Explanation: Suppose they meet after 'h' hours Then 3h + 4h = 17.5 7h = 17.5 h = 2.5 hours So they meet at => 4 + 2.5 = 6:30 pm

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