IIT JEE Practice Question and Answer

Q: Find the missing term in the following series ? 10000, 11000, 9900, 10890, ?, 10781 5800 0

  • 1
    10423
    Correct
    Wrong
  • 2
    9801
    Correct
    Wrong
  • 3
    10241
    Correct
    Wrong
  • 4
    9712
    Correct
    Wrong
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Answer : 2. "9801"
Explanation :

Answer: B) 9801 Explanation: Clearly, alternatively we add and subtract 10% of a term to obtain the next term of the series.Thus, 10000 + (10% of 10000)= 11000; 11000 - (10% of 11000) = 9900; 9900 + (10% of 9900)  = 10890; 10890 - (10% of 10890) = 9801. 9801 + (10% of 9801)  = 9801+980 = 10781.So, missing term = 10890- (10% of 10890)= 9801.

Q: If A + B = 2C and C + D = 2A, then 5789 0

  • 1
    A + C = B + D
    Correct
    Wrong
  • 2
    A + C = 2D
    Correct
    Wrong
  • 3
    A + D = B + C
    Correct
    Wrong
  • 4
    A + C = 2B
    Correct
    Wrong
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Answer : 1. "A + C = B + D"
Explanation :

Answer: A) A + C = B + D Explanation: Given,   A + B = 2C ----(i)   C + D = 2A----(ii)   Adding (i) and (ii) we get : A + B + C + D = 2C + 2A   =>  B + D = A + C

Q: Thunder is to Lightning as Grape is to 5781 0

  • 1
    Wine
    Correct
    Wrong
  • 2
    Soil
    Correct
    Wrong
  • 3
    Seed
    Correct
    Wrong
  • 4
    Water
    Correct
    Wrong
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Answer : 3. "Seed"
Explanation :

Answer: C) Seed Explanation: Lightning produces thunder just as a seed will eventually produce a grape.

Q: Find the wrong number from the following series ?37   47    52    67    87    112    142 5780 0

  • 1
    87
    Correct
    Wrong
  • 2
    47
    Correct
    Wrong
  • 3
    52
    Correct
    Wrong
  • 4
    67
    Correct
    Wrong
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Answer : 2. "47"
Explanation :

Answer: B) 47 Explanation: The given series follows the rule,+(5x1), +(5x2), +(5x3), +(5x4), +(5x5),.... So starting from 37, 37 + 5 = 42, 42 + 10 = 52, 52 + 15 = 67, 67 + 20 = 87,...So wrong number is 47 which is to be 42.

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Answer :
Explanation :

1. Answer (c) Each time we order 1, one apple is added to the basket but each time when 4 is ordered, one apple is removed from it. Required number of apples = number of 1's - number of 4's = 6 - 4 = 2 2. Answer (d) Each time we order 1, 2 or 3, one fruit is added to the basket but when ever we order 4, two fruits are removed from it. Required number = Number of 1's + Number of 2's + Number of 3's - 2 x (Number of 4's) = 6 + 6 + 7 - (2x4) = 19 - 8 = 11.

Q: Which of the following is an abnormal constituent of urine? 5719 0

  • 1
    Creatinine
    Correct
    Wrong
  • 2
    Uric acid
    Correct
    Wrong
  • 3
    Glucose
    Correct
    Wrong
  • 4
    Urea
    Correct
    Wrong
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Answer : 3. "Glucose"
Explanation :

Answer: C) Glucose Explanation: Normally, urine contains water and wastes, such as urea, uric acid, creatinine, and some ions. However, some of these substances may be abnormally elevated, which usually indicates that something is wrong with the body.   The following are some of the abnormal constituents of urine:: Albumin Bilirubin Glucose Ketone bodies Blood Microbes White blood cells

Q: Three persons A, B and C are standing in a queue. There are five persons between A and B and eight persons between B and C. If there be three persons ahead of C and 21 persons behind A, what could be the minimum number of persons in the queue? 5713 0

  • 1
    41
    Correct
    Wrong
  • 2
    40
    Correct
    Wrong
  • 3
    28
    Correct
    Wrong
  • 4
    27
    Correct
    Wrong
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Answer : 3. "28"
Explanation :

Answer: C) 28 Explanation: Three persons A, B, C can be arranged in a queue in six different ways, ie ABC, CBA, BAC, CAB, BCA, ACB. But since there are only 3 persons ahead of C, so C should be in front of the queue. Thus, there are only two possible arrangements, ie CBA and CAB.   We may consider the two cases as under: Case I:  ←3C↔8B↔5A→21   Clearly, number of persons in the queue = (3+1+8+1+5+1+21=) 40   Case II:  ←3C A↔5B   Number of persons between A and C                     = (8 - 6) = 2    ∵[C↔8B A→21B]   Clearly number of persons in the queue = (3+1+2+1+21) = 28   Now, 28 < 40. So, 28 is the minimum number of persons in the queue.

Q: How many degrees will the minute hand move, in the same time in which the second hand move 4800 ? 5692 0

  • 1
    80 deg
    Correct
    Wrong
  • 2
    160 deg
    Correct
    Wrong
  • 3
    140 deg
    Correct
    Wrong
  • 4
    135 deg
    Correct
    Wrong
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Answer : 1. "80 deg"
Explanation :

Answer: A) 80 deg Explanation: As minute hand covers, 60 degrees Minute hand covers 4800/60 = 80°

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