GATE Practice Question and Answer

Q: At what time will B catch up with A, if A starts from a place at 11.00 A.M. and travels at a speed of 3.5 kmph, B starts at 1.00 P.M. and travels with speeds of 1 kmph for 1 hour, 2 kmph for the next 1 hour, 3 kmph for the next 1 hour and so on. 2432 0

  • 1
    8 : 47 pm
    Correct
    Wrong
  • 2
    6 : 40 pm
    Correct
    Wrong
  • 3
    8 : 42 pm
    Correct
    Wrong
  • 4
    7 : 40 pm
    Correct
    Wrong
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Answer : 4. "7 : 40 pm"
Explanation :

Answer: D) 7 : 40 pm Explanation: At 1 pm ... Distance between A and B = 2x3.5 = 7 kmsat 2 pm .....Distance between A and B = 7 + 3.5 - 1 = 9.5 kmsAt 3 pm ....Distance between A and B = 9.5 + 3.5 - 2 = 11 kms.......At 7 pm distance between A and B = 3 kms.From 7 pm to 8 pm, speed of A = 3.5 kmphspeed of B = 8 kmphRelative speed = 4.5 kmph Time taken by B to meet A = 3/4.5 hrs = 30/45 hrs = 120/3 mins = 40 mins. So meeting time is 7 : 40 PM.

Q: If the sides of a triangle are 26 cm, 24 cm and 10 cm, what is its area ? 2432 0

  • 1
    108 sq.cm
    Correct
    Wrong
  • 2
    112 sq.cm
    Correct
    Wrong
  • 3
    116 sq.cm
    Correct
    Wrong
  • 4
    120 sq.cm
    Correct
    Wrong
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Answer : 4. "120 sq.cm"
Explanation :

Answer: D) 120 sq.cm Explanation: The triangle with sides 26 cm, 24 cm and 10 cm is right angled, where the hypotenuse is 26 cm. Area of the triangle =1/2 x base x height => 1/2 x 24 x 10 = 120 sq.cm

Q: Which elements are malleable and good conductors of electricity? 2421 0

  • 1
    tin and silver
    Correct
    Wrong
  • 2
    iodine and silver
    Correct
    Wrong
  • 3
    tin and xenon
    Correct
    Wrong
  • 4
    iodine and xenon
    Correct
    Wrong
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Answer : 1. "tin and silver"
Explanation :

Answer: A) tin and silver Explanation: Tin and Silver are malleable and good conductors of electricity. The other combinations have a non metal in them which are bad conductors.

Q: Which best describes Genes? 2416 0

  • 1
    long, double chains of nucleic acids.
    Correct
    Wrong
  • 2
    long, single chains of amino acids.
    Correct
    Wrong
  • 3
    long, single chains of nucleic acids.
    Correct
    Wrong
  • 4
    long, double chains of amino acids.
    Correct
    Wrong
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Answer : 1. "long, double chains of nucleic acids."
Explanation :

Answer: A) long, double chains of nucleic acids. Explanation: Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity.   As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.

Q: The intersection of a column and a row 2411 0

  • 1
    Cell
    Correct
    Wrong
  • 2
    Menu
    Correct
    Wrong
  • 3
    Key
    Correct
    Wrong
  • 4
    Field
    Correct
    Wrong
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Answer : 1. "Cell"
Explanation :

Answer: A) Cell Explanation: The intersection of a column and a row in a spread sheet is called as a cell or a bon.

Q: The simple interest on Rs. 25 for 4 months at the rate of 3 paise per rupee per month is : 2407 0

  • 1
    240 paise
    Correct
    Wrong
  • 2
    Rs. 1.40
    Correct
    Wrong
  • 3
    Rs. 2.20
    Correct
    Wrong
  • 4
    Rs. 3
    Correct
    Wrong
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Answer : 4. "Rs. 3"
Explanation :

Answer: D) Rs. 3 Explanation: I = PTR/100I = 25 x 4 x 0.03/100I = 0.03 x 100 = 300 Ps = Rs. 3

Q: How long have i been alive? 2404 0

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Answer :
Explanation :

This is a different way of asking your age. It can be how long you have been living in days weeks months and years since your birth date.

Q: At a certain rate of interest the compound interest of 3 years and simple interest of 5 years for certain sum of money is respectively Rs. 1513.2 and Rs. 2400. Find the common rate of interest per annum ? 2402 0

  • 1
    5%
    Correct
    Wrong
  • 2
    6%
    Correct
    Wrong
  • 3
    4%
    Correct
    Wrong
  • 4
    3%
    Correct
    Wrong
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Answer : 1. "5%"
Explanation :

Answer: A) 5% Explanation: Given compound interest for 3 years = Rs. 1513.2   and simple interest for 5 years = Rs. 2400   Now, we know that  C.I = P1+R100n - 1   => 1513.2 = P1+R1003 - 1 ...........(A)   And S.I = PTR/100   => 2400 = P5R/100 ..................(B)   By solving (A) & (B), we get   R = 5%.

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