IIT JEE Practice Question and Answer

Q: If in an A.P series 18th term is 29 and 29th term is 18. Then find the 49th term ? 1554 0

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

Answer: B) -2 Explanation: We know that in A.P series18th term = a + 17d29th term = a + 28dBut given a + 17d = 29..........(i)a + 28d = 18......... (ii)Solving equation (i) and (ii), we getd = -1put d = -1 in any of the above equations and we get, a = 46Now, we know 49th term can be written as, a + 48d putting the value of a and d in the above equation,a + 48d = 46 + 48(-1) = 46 - 48 = -2 Hence, the 49th term is -2.

Q: A man sell 35 waffers for Rs. 15 each and loses Rs. 40.4. If he sells 35 waffers for Rs. 18, how much does he loss or gain ? 1554 1

  • 1
    Rs. 64
    Correct
    Wrong
  • 2
    Rs. 52
    Correct
    Wrong
  • 3
    Rs. 72
    Correct
    Wrong
  • 4
    Rs. 55
    Correct
    Wrong
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Answer : 1. "Rs. 64"
Explanation :

Answer: A) Rs. 64 Explanation: Given Loss = Rs. 40.4We know loss = cost price - selling price 40.4 = CP - 35(15)=> CP = 40.4 + 525=> CP = Rs. 565.4Now the New selling price of waffer is Rs. 18=> SP = 35(18) = 630Now Gain = SP - CP = 630 -565.4 = Rs. 64.6.

Q: 5x - 6 = 3x - 8 Solve the above equation. 1554 0

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

Answer: B) -1 Explanation: Given 5x - 6 = 3x - 8 5x - 3x = -8 + 6 2x = -2 => x = -1.

Q: Capitalism is characterized by which of the following? 1554 0

  • 1
    Profits
    Correct
    Wrong
  • 2
    A market economy
    Correct
    Wrong
  • 3
    Privately owned businesses
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: Capitalism is an economic system followed by a country or a society which is characterized by Privately owned businesses, a market economy and profits. Capitalism is defined as "production for exchange" driven by the desire for personal accumulation of money receipts in such exchanges, mediated by free markets. The markets themselves are driven by the needs and wants of consumers and those of society as a whole in the form of the bourgeois state.

Q: c with a line over it symbol means 1553 0

  • 1
    with
    Correct
    Wrong
  • 2
    without
    Correct
    Wrong
  • 3
    and
    Correct
    Wrong
  • 4
    or
    Correct
    Wrong
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Answer : 1. "with"
Explanation :

Answer: A) with Explanation: The letter “c” with a line over it is a medical abbreviation often used by doctors, nurses, and other medical professionals. The symbol looks like this: c̄. The c is almost always lower-case. This symbol actually has a very simple meaning. A c with a line over it just means “with”. This abbreviation is often used on patient charts and prescriptions, as well as information or notes written by medical professionals.

Q: What is a Common Multiple? 1553 0

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Answer :
Explanation :

If the Multiples for two or more numbers which are Common, then those Multiples are said to be Common Multiples.    For Example : Multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30,... Multiples of 5 are 5, 10, 15, 20, 25, 30,... Here common multiples of 3 & 5 upto 30 are 15, 30.

Q: Social Rights will not include _____ of the following? 1553 0

  • 1
    Adivasi
    Correct
    Wrong
  • 2
    Women
    Correct
    Wrong
  • 3
    Care for Political Section
    Correct
    Wrong
  • 4
    Children
    Correct
    Wrong
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Answer : 3. "Care for Political Section"
Explanation :

Answer: C) Care for Political Section Explanation:

Q: Blood group compatibility for marriage? 1552 0

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Answer :
Explanation :

Matching blood group before marriage is important. This is to prevent Rh incompatibility. Rh incompatibility can lead to erythroblastosis fetalis (Hemolytic disease of the newborn-HDN). Fetal RBC gets destroyed & newborn may get severe anaemia, jaundice. This jaundice is more severe than Physiological jaundice ( which is the most common and will usually resolve on its own).   In very severe form, a fetus may die due to heart failure. This is mediated by the antigen-antibodies reaction. Transfer of maternal antibodies across the placenta occurs. This happens when Rh +ve man marries Rh-ve lady.    So Rh +ve man should try to avoid marrying Rh-ve lady.   Matching blood groups for marriage :: Boy : A = Girl : A & AB  Boy : B = Girl : B & AB  Boy : O = Girl : O, A, B & AB  Boy : AB = Girl : AB  Boy : Rh+ve = Girl : Rh+ve  Boy : Rh-ve = Girl : Rh+ve & Rh-ve.    Blood groups that do not match for marriage :: Boy : A = Girl : O & B  Boy : B = Girl : O & A  Boy : AB = Girl : O, A & B  Boy : Rh+ve = Girl : Rh-ve.

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