GATE Practice Question and Answer

Q: Anu's present age is 9 years more than that of what Raj's age will be after five years. Raj's present age is seven years more than that of what Renu's age was 4 years ago. Renu's present age is 19 years. What will be Anu's age after 5 years ? 1680 0

  • 1
    39 yrs
    Correct
    Wrong
  • 2
    36 yrs
    Correct
    Wrong
  • 3
    46 yrs
    Correct
    Wrong
  • 4
    41 yrs
    Correct
    Wrong
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Answer : 4. "41 yrs"
Explanation :

Answer: D) 41 yrs Explanation: Anu = (Raj + 5) + 9 = Raj + 14 -------- (I) Raj = (Renu - 4) + 7 = Renu + 3 ------- (II) Raj's age = 19 + 3 = 22 years After 5 years Anu's age = 22 + 14 + 5 = 41 years

Q: Assuming the given statements to be true, find which of the two conclusions A and B given below is/are definitely true. Statements: C < T < L= P > Q,  N > C > Y Conclusions:   A. P > Y       B. Y < P 1680 0

  • 1
    only conclusion B is true.
    Correct
    Wrong
  • 2
    only conclusion A is true.
    Correct
    Wrong
  • 3
    neither conclusion I nor II is true.
    Correct
    Wrong
  • 4
    either conclusion I or II is true.
    Correct
    Wrong
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Answer : 1. "only conclusion B is true."
Explanation :

Answer: A) only conclusion B is true. Explanation: From given statements, we can conclude that N > C < T < L= P > Q  .....(1) Here given that C > Y but in eq(1) we got that C < T < T <= P => Y is definitely less than P. So only conclusion B is True.

Q: What is 85 of 352? 1680 0

  • 1
    21.5%
    Correct
    Wrong
  • 2
    24.14%
    Correct
    Wrong
  • 3
    23.68%
    Correct
    Wrong
  • 4
    25.47%
    Correct
    Wrong
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Answer : 2. "24.14%"
Explanation :

Answer: B) 24.14% Explanation: Here 85 of 352 => 85 is what percent in 352 Let p% of 352 is 85 Percentage(%) is generally calculated in the total of 100. => p x 352/100  = 85 => p = 8500/352  = 24.14%   Hence, 85 is 24.14% of 352.

Q: What is 70 of 50? 1678 0

  • 1
    35
    Correct
    Wrong
  • 2
    38
    Correct
    Wrong
  • 3
    42
    Correct
    Wrong
  • 4
    44
    Correct
    Wrong
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Answer : 1. "35"
Explanation :

Answer: A) 35 Explanation: what is 70 of 50 means 70% of 50   ⇒70 x 50100= 7 x 5= 35   Hence, 70 of 50 is 35.

Q: 100 percent of which number is 20? 1678 0

  • 1
    100
    Correct
    Wrong
  • 2
    500
    Correct
    Wrong
  • 3
    20
    Correct
    Wrong
  • 4
    0
    Correct
    Wrong
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Answer : 3. "20"
Explanation :

Answer: C) 20 Explanation: Let the rquired number be 'P' According to the question, 100 x P100 = 20=> P = 20 x 100100 = 20 Hence, 100 percent of the number 20 is 20.   Now, you can also try for 20 percent of what number is 100 20 x P100 = 100=> P = 100 x 10020 = 500=> P = 500 Hence, 20 percent of the number 500 is 100.

Q: Is steel a compound? 1676 0

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

Answer: B) FALSE Explanation: Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.

Q: What should be replaced in the place of '?' in the following series ? JAK, KBL, LCM, MDN, ? 1675 0

  • 1
    MEN
    Correct
    Wrong
  • 2
    NEM
    Correct
    Wrong
  • 3
    NEO
    Correct
    Wrong
  • 4
    OEP
    Correct
    Wrong
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Answer : 3. "NEO"
Explanation :

Answer: C) NEO Explanation: This is an alternating series in alphabetical order. The middle letters follow the order ABCDE. The first and third letters are alphabetical beginning with J. The third letter is repeated as a first letter in each subsequent three-letter segment.

Q: What is the chemical name for vitamin A? 1675 0

  • 1
    Retinol
    Correct
    Wrong
  • 2
    Riboflavin
    Correct
    Wrong
  • 3
    Thiamine
    Correct
    Wrong
  • 4
    Niacin
    Correct
    Wrong
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Answer : 1. "Retinol"
Explanation :

Answer: A) Retinol Explanation: Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids. IUPAC Name :: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol   Vitamin Name - Chemical Name Vitamin A   -     Retinol Vitamin B1  -    Thiamine Vitamin B2  -    Riboflavin Vitamin B3  -    Niacin Vitamin B5  -    Pantothenic acid Vitamin B6  -    Pyridoxin Vitamin B7  -    Biotin Vitamin B9  -    Folic acid Vitamin B12  -   Cyanocobalamin Vitamin C     -   Ascorbic acid Vitamin D     -   Calciferol Vitamin E      -   Tocoferol Vitamin K      -   Phylloquinone and Menaquinones

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