GATE Practice Question and Answer

Q: In one year, the Amount collected for social welfare, of a village increased by 10% and in the next year, it decreased by 10%. If at the end of 2nd year, the amount was 7920, what was it in the beginning ? 1818 0

  • 1
    8800
    Correct
    Wrong
  • 2
    8650
    Correct
    Wrong
  • 3
    8000
    Correct
    Wrong
  • 4
    8980
    Correct
    Wrong
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Answer : 3. "8000"
Explanation :

Answer: C) 8000 Explanation: Let the amount collected be 'A'Then, from the given conditions,A x 110/100 x 90/100 = 7920 A x 0.99 = 7920 A = 7920/0.99=> 8000

Q: What are the two types of pure substances? 1817 0

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Answer :
Explanation :

An atom is the smallest particle of a substance. Chemical substances are divided into two major groups. They are 1. Pure Substances (and) 2. Mixtures.   There are two types of pure substances that are Elements and Compounds.   Elements : An element is a substance that is made up of only one kind of atoms and cannot be broken down into simpler substances by chemical means. Metals and Non- metals come under elements. Examples of elements are Iron, Silver, Gold, Mercury etc.   Compounds : A Compound is a substance that is formed when two or more elements combine chemically. Examples of compounds are Water, Carbon dioxide, methane, vinegar etc.   Mixtures : A Mixture is formed when two or more substances mixed together but not chemically combined. Example: Air.

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Answer :
Explanation :

The poison was in the ice. When the girl drank the iced tea, the ice was still fully frozen. Gradually, as the ice cubes melted the poison was released into the drink.   Hence, the girl who died, drunk the tea after the ice melted. So, she was died.

Q: Simplify 39.96% of 649.85 ÷13.07 = 45.14 - ? 1817 0

  • 1
    25
    Correct
    Wrong
  • 2
    26
    Correct
    Wrong
  • 3
    27
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 1. "25"
Explanation :

Answer: A) 25 Explanation: This can be easily simplified by Approximation process Given 39.96% of 649.85 ÷13.07 = 45.14 - ? can be written as  40% of 650 ÷13 = 45 - ?   40 x 65010013 = 45 - ?? = 45 - 20? = 25.

Q: India is the largest producer of 1815 0

  • 1
    Cotton
    Correct
    Wrong
  • 2
    Milk
    Correct
    Wrong
  • 3
    Mangoes
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: As per the latest updates, India is :   Largest producer of milk. Largest producer of millets in the world. Largest producer of jute. Largest producer of ginger. Largest producer of bananas. Largest producer of castor oil seeds. Largest producer of mangoes. Largest producer of safflower oil seeds. Largest producer of papayas. Largest producer of cottonseed (As per International Cotton Advisory Committee (ICAC) report for the month of March 2017)   Second largest producer of tea, the first position being held by China. Second largest producer of sugarcane, the first position being held by Brazil. Second largest producer of wheat, the first position being held by China. Second largest producer of onions, the first position being held by China. Second largest producer of potatoes, the first position being held by China. Second largest producer of garlic, the first position being held by China. Second largest producer of rice, the first position being held by China. Second largest producer of cement., next to China. Second largest producer of silk, the first position being held by China.

Q: Four person A, B, C and D. The sum of their present age is 176. Four years ago ratio of their age was 11: 9 : 6 : 14, then find who is eldest and youngest among them ? 1815 0

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    A is eldest & C is youngest
    Correct
    Wrong
  • 2
    D is eldest & C is youngest
    Correct
    Wrong
  • 3
    C is eldest & A is youngest
    Correct
    Wrong
  • 4
    A is eldest & B is youngest
    Correct
    Wrong
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Answer : 2. "D is eldest & C is youngest"
Explanation :

Answer: B) D is eldest & C is youngest Explanation: Given sum of present ages of A, B, C & D A + B + C + D = 176 and also given that, (A-4) : (B-4) : (C-4) : (D-4) = 11 : 9 : 6 : 14 Let the ratio = x => A-4 + B-4 + C-4 + D-4 = 11x + 9x + 6x + 14x => (A + B + C + D ) - 16 = 40x => 176 - 16 = 40x => x = 4 => A = 44 + 4 = 48 => B = 40 => C = 28 => D = 60 Therefore, from the above conclusions D is eldest with 60 years and C is youngest with 28 years of ages.

Q: Whale : Mammal :: Rat : ? 1815 0

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    Rodent
    Correct
    Wrong
  • 2
    Mammal
    Correct
    Wrong
  • 3
    Amphibian
    Correct
    Wrong
  • 4
    Reptile
    Correct
    Wrong
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Answer : 1. "Rodent"
Explanation :

Answer: A) Rodent Explanation: Whale belongs to Mammal category whereas Rat belongs to Rodent.

Q: A word i know, six letters it contains, subtract just one and twelve remains. What is it? 1815 0

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Answer :
Explanation :

DOZENS. If we remove 'S' from it, it is DOZEN which tells that 12.

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