GATE Practice Question and Answer

Q: Find the next number in the given number series? 96, 95, 87, 78, ? 2690 0

  • 1
    64
    Correct
    Wrong
  • 2
    57
    Correct
    Wrong
  • 3
    29
    Correct
    Wrong
  • 4
    14
    Correct
    Wrong
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Answer : 4. "14"
Explanation :

Answer: D) 14 Explanation: The given number series is 96, 95, 87, 78, ?  It follows a pattern that, 9696 - 12 = 9595 - 23 = 95 - 8 = 8787 - 32 = 87 - 9 = 7878 - 43 = 78 - 64 = 14   Hence, the next number in the given number series is 14.

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. 2687 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 ? 2673 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: A driver of auto rickshaw makes a profit of 20% on every trip when he carries 3 passengers and the price of petrol is Rs. 30 a litre. Find the % profit for the same journey if he goes for 4 passengers per trip and the price of petrol reduces to Rs. 24 litres ? 2670 0

  • 1
    68%
    Correct
    Wrong
  • 2
    80%
    Correct
    Wrong
  • 3
    75%
    Correct
    Wrong
  • 4
    100%
    Correct
    Wrong
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Answer : 4. "100%"
Explanation :

Answer: D) 100% Explanation: When 3 passengers income was 3xexpense= Rs.30 profit =20% of 30 = Rs.6 That means his earning is Rs.36. so that per passenger fare must be Rs.12. When 4 passengersearning = 12x4=Rs.48.expense =Rs.24.profit = Rs.24 = 100%

Q: Sound following a flash of lightning is called 2669 0

  • 1
    Stoning
    Correct
    Wrong
  • 2
    Bolting
    Correct
    Wrong
  • 3
    Thunder
    Correct
    Wrong
  • 4
    Cloud clash
    Correct
    Wrong
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Answer : 3. "Thunder"
Explanation :

Answer: C) Thunder Explanation: The Sound Following the flash of lighting is because of Thunder.   Lightning is seen earlier than thunder because light travels much faster than sound.   The roar of thunder is the result of a shock wave produced when lightning super-heats the air through which it passes, causing that air to expand very rapidly. This rapid expansion of air creates a shock wave that travels outward at close to the speed of sound.

Q: A man pointing to a lady says, "Her brother is the father of my only son's sister."  How is that lady related to the man ? 2668 0

  • 1
    sister of father-in-law
    Correct
    Wrong
  • 2
    daughter-in-law
    Correct
    Wrong
  • 3
    Sister
    Correct
    Wrong
  • 4
    daughter
    Correct
    Wrong
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Answer : 3. "Sister"
Explanation :

Answer: C) Sister Explanation:

Q: Two trains start from same place at same time at right angles to each other. Their speeds are 36km/hr and 48km/hr respectively. After 30 seconds the distance between them will be ? 2665 0

  • 1
    900 mts
    Correct
    Wrong
  • 2
    300 mts
    Correct
    Wrong
  • 3
    250 mts
    Correct
    Wrong
  • 4
    500 mts
    Correct
    Wrong
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Answer : 4. "500 mts"
Explanation :

Answer: D) 500 mts Explanation: Using pythagarous theorem,distance travelled by first train = 36x5/18x30 = 300mdistance travelled by second train = 48x5/18x30 = 400mso distance between them =√( 90000 + 160000) = √250000 = 500mts.

Q: One major cause of floods is 2665 0

  • 1
    light rain over a large area
    Correct
    Wrong
  • 2
    a decrease in stream discharge
    Correct
    Wrong
  • 3
    rapid spring snowmelt
    Correct
    Wrong
  • 4
    increased capacity of stream channels
    Correct
    Wrong
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Answer : 3. "rapid spring snowmelt"
Explanation :

Answer: C) rapid spring snowmelt Explanation: There are lots of reasons behind the flood in any area but the main reason is a heavy downpour or rapid snowmelt can flood canyons with a mixture of soil, rock, and water is a major cause of floods.   When the spring times come, sometimes there's a lot of warmth that suddenly comes, especially nowadays when there are things such as global warming. So the snow melts and large amounts of water can flood the fields that are often found at the foot of a mountain or similar things.   But they may also be caused by deforestation, drainage channel modification from a landslide, earthquake or volcanic eruption. Examples include outburst floods and lahars.

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