GATE Practice Question and Answer

Q: How important is positive attitude to you ? 1570 0

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Answer :
Explanation :

With a positive attitude you see the bright side of life, become optimistic, and expect the best to happen. It is certainly a state of mind that is well worth developing. Not only it enriches one’s experience of life, but it also paves the way for self-development leading one towards attaining the desired results. As regards employment, it is a valuable thing to maintain positive attitude. Whether you are a manager or a subordinate, maintaining positive attitude in the work place brings lots of benefits while allowing you to fulfill your objectives successfully.A positive frame of mind can help you in many ways, such as:- Making you feel inspired.- Identification.- Believing in yourself and in your abilities.- You look for solutions, instead of dwelling on problems.- The most important thing is building relations.

Q: What value will come in place of question mark (?) in the number - series given below  ?  4, 30, ?, 1440, 7195, 71940 1569 0

  • 1
    145
    Correct
    Wrong
  • 2
    545
    Correct
    Wrong
  • 3
    650
    Correct
    Wrong
  • 4
    999
    Correct
    Wrong
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Answer : 1. "145"
Explanation :

Answer: A) 145 Explanation: 4       30       ?     1440       7195      71940   Here the given series follows a pattern of   4   4 x 10 - 10 = 30   30 x 5 - 5  = 145   145 x 10 - 10 = 1440   1440 x 5 - 5 = 7195   7195 x 10 - 10 = 71940   Hence, the missing number is 145

Q: Sweety is 54 years old and her mother is 80. How many years ago was Sweety's mother three times her age? 1569 0

  • 1
    20
    Correct
    Wrong
  • 2
    41
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    33
    Correct
    Wrong
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Answer : 2. "41"
Explanation :

Answer: B) 41 Explanation: Given P = 54 and M = 80 According to the question, Let ‘A’ years ago, M = 3P => M - A/P - A = 3 => 80 - A = 3(54 - A) => 80 - A = 162 - 3A => 2A = 82 => A = 41 Therefore, A = 41 years ago Sweety’s mother was 3 times of Sweety’s age. Hence, at the age S = 13 and M = 39.

Q: A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present ? 1568 0

  • 1
    36 yrs
    Correct
    Wrong
  • 2
    38 yrs
    Correct
    Wrong
  • 3
    40 yrs
    Correct
    Wrong
  • 4
    42 yrs
    Correct
    Wrong
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Answer : 3. "40 yrs"
Explanation :

Answer: C) 40 yrs Explanation: Let the mother's present age be x years. Then, the person's present age = 2/5 x years. (2x/5 + 8) = 1/2 (x + 8) 2(2x + 40) = 5(x + 8) => x = 40.

Q: Express 0.875 and 0.375 as a Fraction. 1568 0

  • 1
    3/11 & 7/11
    Correct
    Wrong
  • 2
    7/9 & 9/13
    Correct
    Wrong
  • 3
    7/8 & 3/8
    Correct
    Wrong
  • 4
    7/9 & 9/11
    Correct
    Wrong
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Answer : 3. "7/8 & 3/8"
Explanation :

Answer: C) 7/8 & 3/8 Explanation: Given 0.875 and 0.375 0.875 :: After decimal point there are 3 digits 875 Now, mutiply and divide 0.875 with 1000 0.875 x 10001000 = 8751000 Now, this can be reduced to fraction 78Therefore, 0.875 as fraction = 78 Similarly, 0.375 ::  After decimal point there are 3 digits 375 Now, mutiply and divide 0.375 with 1000 0.375 x 10001000 = 3751000Now, this can be reduced to fraction 38Therefore, 0.375 as fraction = 38

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Answer : 4. "Rs. 500"
Explanation :

Answer: D) Rs. 500 Explanation: Watson bought the book for Rs. 240 and sold to Johny at a profit of 50%. S.P = C.P(1 + P%/100) => S.P for Watson = C.P for Johny = 240(1 + 50/100) = 240 x 1.5 = Rs. 360 Let Johny quoted the marked price of the book as Rs. M We know, SP = M.P(1 - Discount(%)/100) Here discount = 10% to Shekar, S.P for Johny = M(1 - 10/100) = 0.9M But Johny want to earn 25% profit, => S.P = C.P(1 + P%/100) => 0.9M = 360(1 + 25/100) => M = (360x1.25)/0.9 => M = Rs. 500 Therefore, Johny should quote Rs. 500 as the marked price of the book to get 25% profit and allowing 10% discount to Shekar.

Q: What are the sides of the dna ladder made of 1567 0

  • 1
    nitrates and sugars
    Correct
    Wrong
  • 2
    sugars and hydrates
    Correct
    Wrong
  • 3
    sugars and phosphates
    Correct
    Wrong
  • 4
    phosphates and nitrates
    Correct
    Wrong
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Answer : 3. "sugars and phosphates"
Explanation :

Answer: C) sugars and phosphates Explanation: DNA is a double-stranded molecule twisted into a helix. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.

Q: On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is  ? 1566 0

  • 1
    476190476
    Correct
    Wrong
  • 2
    48617
    Correct
    Wrong
  • 3
    47619
    Correct
    Wrong
  • 4
    4587962
    Correct
    Wrong
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Answer : 3. "47619"
Explanation :

Answer: C) 47619 Explanation: By hit and trail, we find that 47619 x 7 = 333333. 7) 333333 (47619    333333----------------        0 And 476190476 x 7 = 3333333333 but smallest number is 47619.

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