GATE Practice Question and Answer

Q: A number increased by 30% gives 390. The number is 2423 0

  • 1
    180
    Correct
    Wrong
  • 2
    300
    Correct
    Wrong
  • 3
    480
    Correct
    Wrong
  • 4
    260
    Correct
    Wrong
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Answer : 2. "300"
Explanation :

Answer: B) 300 Explanation: Let the number be 'N'Given N + 30N/100 = 390=> 130N/100 = 390=> N = 390 x 10/13=> N = 300.

Q: How many 6-digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 and 7 so that the digits should not repeat and the second last digit is even ? 2423 0

  • 1
    521
    Correct
    Wrong
  • 2
    720
    Correct
    Wrong
  • 3
    420
    Correct
    Wrong
  • 4
    225
    Correct
    Wrong
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Answer : 2. "720"
Explanation :

Answer: B) 720 Explanation: Let last digit is 2when second last digit is 4 remaining 4 digits can be filled in 120 ways, similarly second last digit is 6 remained 4 digits can be filled in 120 ways.so for last digit = 2, total numbers=240   Similarly for 4 and 6When last digit = 4, total no. of ways =240and last digit = 6, total no. of ways =240so total of 720 even numbers are possible.

Q: In a hostel, there was food for 1000 students for one month. After 10 days, 1000 more students joined the hostel. How long would the students be able to carry on with the remaining food? 2414 0

  • 1
    10 days
    Correct
    Wrong
  • 2
    15 days
    Correct
    Wrong
  • 3
    20 days
    Correct
    Wrong
  • 4
    5 days
    Correct
    Wrong
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Answer : 1. "10 days"
Explanation :

Answer: A) 10 days Explanation: After 10 days, the remaining food would be sufficient for the 1000 students for 20 more days -->If 1000 more students are added, it shall be sufficient for only 10 days (as the no. of students is doubled, the days are halved).

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Answer : 2. "10"
Explanation :

Answer: B) 10 Explanation: Raj Tarun's age = 0 when he was born.Then, given his brother is 6 years old.Then his father is 6 + 32 = 38 when Raj Tarun was bornAnd his mother is 3 years yonger than his father => so his mother was 35 years old when Raj Tarun was bornand his sister is 25 year younger than his mother so Raj Tarun's sister was 10 years old when Raj Tarun was born.

Q: What is the 13th letter of the English Alphabet? 2413 0

  • 1
    M & N
    Correct
    Wrong
  • 2
    M & M
    Correct
    Wrong
  • 3
    N & N
    Correct
    Wrong
  • 4
    N & L
    Correct
    Wrong
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Answer : 1. "M & N"
Explanation :

Answer: A) M & N Explanation: There are 26 English Alphabets. They are:   A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z.   Therefore, from the left end the 13th letter is M and is Consonent. And from the right end the 13th letter is N and is Consonent.

Q: 82.5% of 2360? 2412 0

  • 1
    1960
    Correct
    Wrong
  • 2
    1954
    Correct
    Wrong
  • 3
    1947
    Correct
    Wrong
  • 4
    1931
    Correct
    Wrong
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Answer : 3. "1947"
Explanation :

Answer: C) 1947 Explanation: Given 82.5% of 2360  82.5100 x 2360 = 0.825 x 2360 = 1947

Q: Which of the following equations represents Photosynthesis? 2411 0

  • 1
    6CO2 + 6H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 2
    C6H12O6 + 6O2 -----> CO2 + 6H2O
    Correct
    Wrong
  • 3
    CO2 + H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 4
    6O2 + 6H2O -----> C6H12O6 + 6CO2
    Correct
    Wrong
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Answer : 1. "6CO2 + 6H2O -----> C6H12O6 + 6O2"
Explanation :

Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.   Photosynthesis can be represented using a chemical equation.   The overall balanced equation is                 6CO2 +  6H2O   →Sunlight    C6H12O6   +   6O2Source of Carbon & Oxygen  + Source of Electrons & Hydrogen + Energy that drives Photosynthesis             ----> Sugar + Gas produced by splitting water.   Where  CO2 = carbon dioxide  H2O = waterC6H12O6 = glucose  O2 = oxygen.

Q: Where are saved files stored in computer ? 2402 0

  • 1
    Hard disk
    Correct
    Wrong
  • 2
    Cache
    Correct
    Wrong
  • 3
    RAM
    Correct
    Wrong
  • 4
    Any of above
    Correct
    Wrong
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Answer : 1. "Hard disk"
Explanation :

Answer: A) Hard disk Explanation: Most operating systems store files on a hard disk.

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