IIT JEE Practice Question and Answer

Q: How many number of weights do you need to weight 31 kg of Rice if you have one kg of weight stone ? 2606 0

  • 1
    3
    Correct
    Wrong
  • 2
    5
    Correct
    Wrong
  • 3
    7
    Correct
    Wrong
  • 4
    9
    Correct
    Wrong
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Answer : 2. "5"
Explanation :

Answer: B) 5 Explanation: There are total 5 ways.we have only one kg of weight so,2kg = 1kg + 1kg4kg = 1 + 2 + 18kg = 1 + 2 + 4 + 116kg = 1 + 2 + 4 + 8 + 131kg = 1 + 2 + 4 + 8 + 16So 5 weights are needed.

Q: The ratio of present ages of Hema and Chinnu is 13:17. Four years ago the ratio of their ages was 11:15. What will be the ratio of their ages six years hence ? 1559 0

  • 1
    3 : 7
    Correct
    Wrong
  • 2
    7 : 9
    Correct
    Wrong
  • 3
    4 : 5
    Correct
    Wrong
  • 4
    1 : 3
    Correct
    Wrong
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Answer : 3. "4 : 5"
Explanation :

Answer: C) 4 : 5 Explanation: Let their present ages be 13x and 17x.Then, 13x-4/17x-4 = 11/15. Solving this, we get x = 2.Required ratio = 13x2 + 6/17x2 + 6 = 32/40 = 4/5.

Q: Statement: There has been a significant drop in the water level of all the lakes supplying water to the city.Courses of action:I. The water supply authority should impose a partial cut in supply to tackle the situation.II. The government should appeal to all the residents though mass media for minimal use of water. 2661 0

  • 1
    Only I follows
    Correct
    Wrong
  • 2
    Only II follows
    Correct
    Wrong
  • 3
    Both I & II follows
    Correct
    Wrong
  • 4
    Neither I nor II follows
    Correct
    Wrong
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Answer : 3. "Both I & II follows"
Explanation :

Answer: C) Both I & II follows Explanation: The situation can be tackled by periodic cuts in supply, and urging people to conserve water. So both the courses follow.

Q: If 'x' means '-', '÷' means '+', '-' means '÷' and '+' means 'x', then 24 - 4 ÷ 6 x 3 + 4 = ? 5965 0

  • 1
    0
    Correct
    Wrong
  • 2
    1
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 1. "0"
Explanation :

Answer: A) 0 Explanation: From the given information in the question24 ÷ 4 + 6 - 3 x 4 6 + 6 - 12 = 0

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Answer :
Explanation :

Day               Play Monday        No playTuesday           PWednesday       SThursday          RFriday              QSaturday          T Answers : From the above table : 1) On Friday play Q was organised. 2) On Monday Noplay  was organised. 3)  On Thursday Play R was organised.

Q: Rajitha invested 25% more than Santhosh. Santhosh invested 30% less than Raju, who invested Rs. 6,000. What is the ratio of the amount that Rajitha invested to the total amount invested by all of them together ? 1526 0

  • 1
    25 : 114
    Correct
    Wrong
  • 2
    35 : 103
    Correct
    Wrong
  • 3
    15 : 108
    Correct
    Wrong
  • 4
    41 : 94
    Correct
    Wrong
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Answer : 2. "35 : 103"
Explanation :

Answer: B) 35 : 103 Explanation: Santhosh's investment = 6000 x 70/100 = Rs.4200Rajitha's investment = 4200 x 5/4 = Rs.5250Therefore, total amount invested = 6000 + 4200 + 5250 = Rs.15450.Required ratio = 5250 : 15450 = 35 : 103.

Q: 'BE' is related to 'GJ' in the same way as 'PS' is related to ? 1983 0

  • 1
    VX
    Correct
    Wrong
  • 2
    TU
    Correct
    Wrong
  • 3
    UX
    Correct
    Wrong
  • 4
    TV
    Correct
    Wrong
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Answer : 3. "UX"
Explanation :

Answer: C) UX Explanation: Each corresponding letter moves five places forward in the alphabet.Here as BE is related to GJ then PS will relate to UX.

Q: Find the wrong number from the following series ?7   18   40   106   183   282   403 5103 0

  • 1
    18
    Correct
    Wrong
  • 2
    183
    Correct
    Wrong
  • 3
    40
    Correct
    Wrong
  • 4
    106
    Correct
    Wrong
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Answer : 3. "40"
Explanation :

Answer: C) 40 Explanation: The given series follows the rule,+(11x1), +(11x3), +(11x5), +(11x7), +(11x9),.... So starting from 7, 7 + 11 = 18, 18 + 33 = 51, 51 + 55 = 106, ...So wrong number is 40 which is to be 51.

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