IIT JEE Practice Question and Answer

Q: In a certain Business, the profit is 220% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit ? 1874 0

  • 1
    61%
    Correct
    Wrong
  • 2
    75%
    Correct
    Wrong
  • 3
    55%
    Correct
    Wrong
  • 4
    81%
    Correct
    Wrong
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Answer : 1. "61%"
Explanation :

Answer: A) 61% Explanation: Let C.P.= Rs. 100. Then, Profit = Rs.220,  S.P. = Rs.320.   New C.P. = 125% of Rs. 100 = Rs. 125  New S.P. = Rs.320. Profit = Rs. (320 - 125) = Rs. 195   Required percentage = 195320×100== 60.9 =~ 61%

Q: Can you spot the missing number? 1874 0

  • 1
    3
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    Both A & B
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Both A & B"
Explanation :

Answer: C) Both A & B Explanation: The given number puzzle can be soved in two ways. Logic 1 :: Row 1  - 2 x 3 = 6 , 6 x 3 = 18 Row 2  - 4 x 5 = 20 , 20 x 5 = 100 Row 3  - 3 x 7 = 21 , 21 x 7 = 147   Hence, the missing number could be 3.   Logic 2 :: Row 1 - 6 x (2+1) = 18 Row 2 - 20 x (4+1) = 100 Row 3 - 21 x (6+1) = 147   Hence, the missing number could be 6.   Therefore, 3 or 6 is the right answer.

Q: When referring to student loans what is a grace period? 1873 0

  • 1
    6 months
    Correct
    Wrong
  • 2
    12 months
    Correct
    Wrong
  • 3
    18 months
    Correct
    Wrong
  • 4
    24 months
    Correct
    Wrong
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Answer : 1. "6 months"
Explanation :

Answer: A) 6 months Explanation: 6 months after graduating or quitting school when you have to start paying back the loans.   A grace period is one term that’s provided for student loans that allow you to delay payments up to a certain length of time, without penalty. During a grace period no late charges would apply, and the loan would not risk falling into default for missed payments. The grace period allows you time to find financial stability prior to having to make payments on your student loans.   Many students use student loans to help pay for their college expenses, including tuition, books, room and board, and other living expenses. Students are expected to repay these loans when they graduate.

Q: How many birthdays does the average person have? 1872 0

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Answer :
Explanation :

Any person can have only 1 birthday i.e, the day he was born. And every year we celebrate it's anniversaries.

Q: In Cricket the two sets of wickets are 1870 0

  • 1
    22 yards apart
    Correct
    Wrong
  • 2
    24 yards apart
    Correct
    Wrong
  • 3
    20 yards apart
    Correct
    Wrong
  • 4
    21 yards apart
    Correct
    Wrong
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Answer : 1. "22 yards apart"
Explanation :

Answer: A) 22 yards apart Explanation: According to the rules and regulations of cricket, the height of the stumps must be of 28 inches or 71.12 cms. The total distance between the off stump and leg stump should be 9 inches or 22.86 cms. 1. Width and pitching. Two sets of wickets shall be pitched opposite and parallel to each other at a distance of 22 yards/20.12 meters.

Q: Which city has become the first Indian city to have its own logo? 1870 0

  • 1
    Bengaluru
    Correct
    Wrong
  • 2
    Hyderabad
    Correct
    Wrong
  • 3
    New Delhi
    Correct
    Wrong
  • 4
    Gujarat
    Correct
    Wrong
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Answer : 1. "Bengaluru"
Explanation :

Answer: A) Bengaluru Explanation: Bengaluru becomes the first Indian city to get its very own logo Much like New York and Singapore, Bengaluru is set to get its own logo, becoming the first Indian city to do so.

Q: Sound travels fastest in 1869 0

  • 1
    Vacuum
    Correct
    Wrong
  • 2
    Air
    Correct
    Wrong
  • 3
    Glass
    Correct
    Wrong
  • 4
    Water
    Correct
    Wrong
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Answer : 3. "Glass"
Explanation :

Answer: C) Glass Explanation: Sound is a mechanical vibration and needs a medium for propagation. The higher the density of the medium, the faster the sound travels. So, sound cannot travel through vacuum.   As the sound travels faster in solids than liquids and gases, sound travels faster in the glass than Air and water.

Q: In plants, chloroplasts are necessary for 1868 0

  • 1
    photosynthesis
    Correct
    Wrong
  • 2
    storage
    Correct
    Wrong
  • 3
    cell movement
    Correct
    Wrong
  • 4
    respiration
    Correct
    Wrong
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Answer : 1. "photosynthesis"
Explanation :

Answer: A) photosynthesis Explanation: Plants are producers, which means they make their own food. Chloroplasts are organelles found in eukaryotic and plant cells that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. Plants use energy from sunlight to help make their food, but they need chloroplasts to do it.   Hence, in plants, chloroplasts are necessary for Photosynthesis.

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