GATE Practice Question and Answer

Q: Whether the last number 240 in the following series is according to the remaining numbers pattern ? 2, 4, 12, 48, 240 1416 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE Answer & Explanation Answer:
    Correct
    Wrong
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Answer : 1. "TRUE"
Explanation :

Answer: A) TRUE Explanation: The given series follows, 2 2 x 2 = 4 4 x 3 = 12 12 x 4 = 48 48 x 5 = 240.

Q: A salesman calculated his profit on the marked price and finds it to be 30%. He forgets the fact that he gave a discount of 20%. What is his actual profit percentage? 1415 0

  • 1
    260/11%
    Correct
    Wrong
  • 2
    18.4%
    Correct
    Wrong
  • 3
    22.5%
    Correct
    Wrong
  • 4
    100/7%
    Correct
    Wrong
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Answer : 4. "100/7%"
Explanation :

Answer: D) 100/7% Explanation: When profit is calculated on Marked Price (M.P) then, C.P = M.P - P% Let M.P = 100  => C.P = 100 - 30 = 70  But S.P = Rs. 80 as he gave 20% discount,  Now, Actual Profit = 80-7070x100   = 100/7 %

Q: What is the smallest unit that can evolve? 1412 0

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Answer :
Explanation :

The population is the smallest unit of living organisms that can undergo evolution.

Q: The edge of three cubes of metal is 3 m, 4 m and 5 m. They are melted and formed into a single cube. Find the edge of the new cube  ? 1412 0

  • 1
    15 m
    Correct
    Wrong
  • 2
    4 m
    Correct
    Wrong
  • 3
    6 m
    Correct
    Wrong
  • 4
    9 m
    Correct
    Wrong
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Answer : 3. "6 m"
Explanation :

Answer: C) 6 m Explanation: The edge of the new cube is = 33+43+53 = a3 => a = 6 m.

Q: What tastes better than it smells? 1410 0

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Answer :
Explanation :

Tongue. Yes tongue tastes better than it smells as it can't smell.

Q: A can finish a work in 18 days and B can do the same work in half the time taken by A. then, working together, what part of the same work they can finish in a day ? 1409 0

  • 1
    Total work
    Correct
    Wrong
  • 2
    One-fourth work
    Correct
    Wrong
  • 3
    Half work
    Correct
    Wrong
  • 4
    Two-third work
    Correct
    Wrong
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Answer : 3. "Half work"
Explanation :

Answer: C) Half work Explanation: A can do the work = 18 daysB can do the work = 18/2 = 9 days(A + B)'s 1 day work = 1/18 + 1/9 = 1/6=> In 3 days = 3x1/6 = 1/2 work is completed.

Q: What value will come in place of question mark (?) in following number series? 12, 16, 32, 68, ? 1408 0

  • 1
    198
    Correct
    Wrong
  • 2
    164
    Correct
    Wrong
  • 3
    132
    Correct
    Wrong
  • 4
    118
    Correct
    Wrong
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Answer : 3. "132"
Explanation :

Answer: C) 132 Explanation: Given series is    12        16         32          68         ?   Here it follows a pattern that,   12   12 + (2x2) = 16   16 + (4x4) = 32   32 + (6x6) = 68   68 + (8x8) = 132

Q: Two persons start running simultaneously around a circular track of length 600 m from the same point at speeds of 25 kmph and 35 kmph. When will they meet for the first time any where on the track  ? 1408 0

  • 1
    54 sec
    Correct
    Wrong
  • 2
    36 sec
    Correct
    Wrong
  • 3
    72 sec
    Correct
    Wrong
  • 4
    11 sec
    Correct
    Wrong
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Answer : 2. "36 sec"
Explanation :

Answer: B) 36 sec Explanation: Time taken to meet the first time = length of track/relative speed   Given the length of the track is 600 m   The relative speed = 25 + 35 = 60 kmph = 60 x 5/18 m   Therefore Time = 60025+35518= 600/60 x (18/5) = 36 sec.

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