GATE Practice Question and Answer

Q: Simplify the following : 4 15 × 3 13 + ? = 20% of 120 1242 0

  • 1
    10
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    36
    Correct
    Wrong
  • 4
    40
    Correct
    Wrong
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Answer : 1. "10"
Explanation :

Answer: A) 10 Explanation: Given equation can be written as 215 x 103 + ? = 24=> 14 + ? = 24=> ? = 24 - 14=> ? = 10

Q: The day before yesterday, I was 25 years old, and next year I will turn 28. How is it possible? 3848 0

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Answer :
Explanation :

On carefully inspecting this question, one can understand that there are two days which are important and these are: A. My Birthday. B. The day when I am making this statement. If you think for a while, you will understand that such statements can be made only around the year’s end. So, if my birthday is on 31 December, then I will be making this statement on 1 January. I will further explain using the following example: 1. Consider that today is 01 January 2017. 2. Then, the day before yesterday was 30 December 2016 and according to the question I was 25 then. 3. Yesterday was 31 December 2016, which happens to be my birthday too (Woohoo!), and my age increases by one to become 26. 4. I will turn 27 on my birthday this year (31 December 2017). 5. I will turn 28 on my birthday next year (31 December 2018). Now, if you read the question again, it will make more sense:   The day before yesterday(30 December 2016), I was 25 years old and next year(31 December 2018) I will be 28.

Q: Which one of the following is not a prime number? 1678 0

  • 1
    91
    Correct
    Wrong
  • 2
    71
    Correct
    Wrong
  • 3
    41
    Correct
    Wrong
  • 4
    31
    Correct
    Wrong
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Answer : 1. "91"
Explanation :

Answer: A) 91 Explanation: Prime Numbers :: Numbers which are divisible by only 1 and itself are Prime Numbers.   It's answer will be 91. Because 91 can be divisible by 7,13,91,1. It is quite clear that prime number should be divisible only by itself and by 1.

Q: Find the next number in the number series? 1, 4, 12, 32, ? 1918 0

  • 1
    80
    Correct
    Wrong
  • 2
    100
    Correct
    Wrong
  • 3
    192
    Correct
    Wrong
  • 4
    169
    Correct
    Wrong
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Answer : 1. "80"
Explanation :

Answer: A) 80 Explanation: Next number of the sequence 1, 4, 12, 32,... 1 = 2 x 20 4 = 2 x 21 12 = 3 x 22 32 = 4 x 23 80 = 5 x 24.

Q: Which of the following is not a pure substance? 2148 0

  • 1
    Oxygen
    Correct
    Wrong
  • 2
    Carbon dioxide
    Correct
    Wrong
  • 3
    Water
    Correct
    Wrong
  • 4
    Milk
    Correct
    Wrong
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Answer : 4. "Milk"
Explanation :

Answer: D) Milk Explanation: Milk is not a pure substance since it has so many constituents that can be separated physically. Compounds are pure substances formed from elements unlike mixtures.

Q: Lethargic : Vital :: Trite : ? 8320 0

  • 1
    Unique
    Correct
    Wrong
  • 2
    Slug
    Correct
    Wrong
  • 3
    Lazy
    Correct
    Wrong
  • 4
    Skinny
    Correct
    Wrong
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Answer : 1. "Unique"
Explanation :

Answer: A) Unique Explanation: Lethargic means "sluggish", kind of inactive Vital means full of energy, lively So, they are antonyms. So, for the 2nd part of the analogy, you are looking for a antonym to trite Trite means lacking originality or freshness. Overused. Kind of like a cliche So, an antonym could be original, unique, innovative.

Q: Which color has the highest frequency? 1418 0

  • 1
    Violet
    Correct
    Wrong
  • 2
    Red
    Correct
    Wrong
  • 3
    Indigo
    Correct
    Wrong
  • 4
    Green
    Correct
    Wrong
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Answer : 1. "Violet"
Explanation :

Answer: A) Violet Explanation: In VIBGYOR. It has colors ordered from highest to lowest frequency.                 Violet > Indigo > Blue > Green > Yellow > Orange > Red   That says Violet has the highest frequency. We know, Speed of light = Frequency x Wavelength => As frequeny is inversely proportional to wavelength i.e, as frequwncy goes high wavelength goes down.   So, the violet color has the highest frequency.

Q: Rotate : Energy :: Stop : ? 4744 0

  • 1
    Spin
    Correct
    Wrong
  • 2
    Break
    Correct
    Wrong
  • 3
    Inertia
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "Inertia"
Explanation :

Answer: C) Inertia Explanation: To rotate is to energy to stop is to inertia. From the definition itself we know that inertia is a property by virtue of which a body continues to be in the state of rest or in state of motion. So over here whenever energy is supplied then the body starts to move that is a displacement is there and it is rotating where as whenever the body is stopped an inertia of rest is created.   So, Rotate : Energy :: Stop : Inertia.

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