IIT JEE Practice Question and Answer

Q: Which letter indicates systolic pressure? 1927 0

  • 1
    i
    Correct
    Wrong
  • 2
    b
    Correct
    Wrong
  • 3
    c
    Correct
    Wrong
  • 4
    a
    Correct
    Wrong
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Answer : 4. "a"
Explanation :

Answer: D) a Explanation: a -  at the peak of changes in blood pressure indicates the systiolic pressure.

Q: 20 men went to a restaurant. Ninteen of them paid Rs.70 each and the twentieth man paid Rs.90.25 more than the average of all the 20 men. What is the total bill ? 1927 0

  • 1
    Rs. 1495
    Correct
    Wrong
  • 2
    Rs. 548
    Correct
    Wrong
  • 3
    Rs. 850
    Correct
    Wrong
  • 4
    Rs. 1750
    Correct
    Wrong
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Answer : 1. "Rs. 1495"
Explanation :

Answer: A) Rs. 1495 Explanation: Let the average bill paid by twenty members = 'x' But 19 men paid each = Rs. 70 20th man paid Rs. 90.25 more than the avg bill of 20 = x + 90.25 20x = 19(70) + x + 90.2519x = 1330 + 90.2519x = 1420.25x = 1420.25/19 = Rs. 74.75 But the total bill = 20 x 74.75 = Rs. 1495.

Q: A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is at the most  ? 1926 0

  • 1
    215
    Correct
    Wrong
  • 2
    268
    Correct
    Wrong
  • 3
    254
    Correct
    Wrong
  • 4
    216
    Correct
    Wrong
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Answer : 1. "215"
Explanation :

Answer: A) 215 Explanation: Since each ring consists of six different letters, the total number of attempts possible with the three rings is = 6 x 6 x 6 = 216. Of these attempts, one of them is a successful attempt.   Maximum number of unsuccessful attempts = 216 - 1 = 215.

Q: Which city has topped the list of most expensive cities for expatriates, according to Mercer’s 2017 Cost of Living Survey  ? 1926 0

  • 1
    Zurich
    Correct
    Wrong
  • 2
    Launda
    Correct
    Wrong
  • 3
    Germany
    Correct
    Wrong
  • 4
    Toyko
    Correct
    Wrong
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Answer : 2. "Launda"
Explanation :

Answer: B) Launda Explanation: Luanda, the capital of Angola, has topped the list of most expensive cities for expatriates, according to Mercer’s 23rd annual Cost of Living Survey. Hong Kong has acquired 2nd position, followed by Tokyo, Zurich, Singapore, Seoul and Geneva. From India, Mumbai is the most expensive city for expatriates that has ranked 57th on the list, followed by New Delhi (99), Chennai (135), Bangalore (166) and Kolkata (184). The Mercer’s survey includes 209 cities across five continents. The world’s least expensive cities for expatriates, according to Mercer’s survey, are Tunis (209), Bishkek (208) and Skopje (206). Mercer’s authoritative survey is one of the world’s most comprehensive, and is designed to help multinational companies and governments determine compensation allowances for their expatriate employees.

Q: A colour blind person has difficulty in distinguishing which of the two colours ? 1926 0

  • 1
    Green & Red
    Correct
    Wrong
  • 2
    White & Red
    Correct
    Wrong
  • 3
    Blue & Red
    Correct
    Wrong
  • 4
    Red & Black
    Correct
    Wrong
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Answer : 1. "Green & Red"
Explanation :

Answer: A) Green & Red Explanation:

Q: Where is glucose stored in the body? 1926 0

  • 1
    bones
    Correct
    Wrong
  • 2
    blood
    Correct
    Wrong
  • 3
    organs
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 2. "blood"
Explanation :

Answer: B) blood Explanation: In human body, glucose is stored in blood stream before it is converted to glycogen. Excess glucose is stored in the form of fats. After conversion, glycogen is stored in Muscles and Liver.

Q: Kalyan purchased a Maruti van for Rs. 1,96,000 and the rate of depreciation is 14(2/7) % per annum. Find the value of the van after two years ? 1926 0

  • 1
    Rs. 1,24,000
    Correct
    Wrong
  • 2
    Rs. 1,44,000
    Correct
    Wrong
  • 3
    Rs. 1,32,000
    Correct
    Wrong
  • 4
    Rs. 1,62,000
    Correct
    Wrong
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Answer : 2. "Rs. 1,44,000"
Explanation :

Answer: B) Rs. 1,44,000 Explanation: Value of Maruti Van, V1 = Rs. 1,96,000Rate of depreciation, r = 14(2/7)% = 100/7%; Time, t = 2 yearsLet V2 is the value after depreciation. V2 = V11 - r100tV2 = 196001 - 10071002 V2 = 196000(6/7)(6/7) V2 = (196000x36)/49 = Rs. 1,44,000.

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Answer : 1. "87"
Explanation :

Answer: A) 87 Explanation: Cp1 = p2 - p1 , Cp2 = p3 - p2 ......Cp23 = p24 - p23Sum of series = (p2-p1) + (p3-p2) + .....(p23-p22) + (p24-p23)All terms get cancelled, except p1 = 2 and p24 = 89 So Sum = -p1 + p24Sum of series = -2 + 89 = 87

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