IIT JEE Practice Question and Answer

Q: What is one benefit of lifelong physical activity? 6015 0

  • 1
    high blood pressure
    Correct
    Wrong
  • 2
    increase in healthy eating habits
    Correct
    Wrong
  • 3
    high physiological age
    Correct
    Wrong
  • 4
    prevention of weight gain
    Correct
    Wrong
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Answer : 3. "high physiological age"
Explanation :

Answer: C) high physiological age Explanation:

Q: Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop? 5988 0

  • 1
    15 minutes
    Correct
    Wrong
  • 2
    20 minutes
    Correct
    Wrong
  • 3
    18 minutes
    Correct
    Wrong
  • 4
    22 minutes
    Correct
    Wrong
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Answer : 2. "20 minutes"
Explanation :

Answer: B) 20 minutes Explanation: Let the total distance to be covered is 84 kms.Time taken to cover the distance without stoppage = 84/42 hrs = 2 hrsTime taken to cover the distance with stoppage = 84/28 = 3 hrs.Thus, he takes 60 minutes to cover the same distance with stoppage.Therefore, in 1 hour he stops for 20 minutes.

Q: If 'x' means '-', '÷' means '+', '-' means '÷' and '+' means 'x', then 24 - 4 ÷ 6 x 3 + 4 = ? 5984 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

Q: Which of the following is not a correct variable type? 5974 0

  • 1
    real
    Correct
    Wrong
  • 2
    char
    Correct
    Wrong
  • 3
    float
    Correct
    Wrong
  • 4
    double
    Correct
    Wrong
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Answer : 1. "real"
Explanation :

Answer: A) real Explanation: A variable provides us with named storage that our programs can manipulate. Each variable in C++ has a specific type, which determines the size and layout of the variable's memory the range of values that can be stored within that memory and the set of operations that can be applied to the variable. The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore. Upper and lowercase letters are distinct because C++ is case-sensitive −   Basic types of variables: 1. bool Stores either value true or false. 2. char Typically a single octet (one byte). This is an integer type. 3. int The most natural size of an integer for the machine. 4. float A single-precision floating point value. 5. double A double-precision floating point value. 6. void Represents the absence of type. 7. wchar_t A wide character type.

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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.

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Answer : 2. "1/5"
Explanation :

Answer: B) 1/5 Explanation: Number of applicants = 5On a day, only 1 leave is approved.Now favourable events =  1 of 5 applicants is approvedProbability that Laxmi priya's leave is granted = 1/5.

Q: ATP is a compound that is synthesized when 5925 0

  • 1
    digestive enzymes break amino acids into smaller pieces
    Correct
    Wrong
  • 2
    energy stored in nitrogen is released froming amino acids
    Correct
    Wrong
  • 3
    energy is stored in chemical bonds is released during cellular respiration
    Correct
    Wrong
  • 4
    chemical bonds between carbon atoms are formed by during photo synthesis
    Correct
    Wrong
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Answer : 3. "energy is stored in chemical bonds is released during cellular respiration"
Explanation :

Answer: C) energy is stored in chemical bonds is released during cellular respiration Explanation:

Q: Find the missing term in the following series ? 10000, 11000, 9900, 10890, ?, 10781 5886 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.

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