GATE Practice Question and Answer

Q: Some children goto ice-cream shop. 9 flavours are available there. Each child takes a cone with two different flavours. No two children take same combination and they have taken all such possible combinations. How many children went to ice cream shop ? 1528 0

  • 1
    28
    Correct
    Wrong
  • 2
    56
    Correct
    Wrong
  • 3
    44
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 4. "36"
Explanation :

Answer: D) 36 Explanation: Given there are 9 flavours of ice creams.   Each child takes the combination of two flavours and no two children will have the same combination   This can be done by  ways i.e children.   Number of children=C29  = 9 x 8 / 1x 2 = 36.

Q: Evaluate : 3.392-2.6123.39-2.69? 1527 0

  • 1
    3
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    6
    Correct
    Wrong
  • 4
    1
    Correct
    Wrong
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Answer : 3. "6"
Explanation :

Answer: C) 6 Explanation:   It is in the form of a2-b2a-b = a+ba-ba-b = a+b   Here a = 3.39   b = 2.61     = 3.39 + 2.61 = 6.

Q: If the first and third letters in the word NECESSARY were interchanged, also the fourth and the sixth letters, and the seventh and the ninth letters, which of the follwing would be the seventh letter from the left ? 1527 0

  • 1
    E
    Correct
    Wrong
  • 2
    S
    Correct
    Wrong
  • 3
    R
    Correct
    Wrong
  • 4
    Y
    Correct
    Wrong
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Answer : 4. "Y"
Explanation :

Answer: D) Y Explanation: we interchange the positions of the letters as shown below:                                    The new letter sequence is CENSSEYRA.Clearly, the seventh letter from the left is Y.

Q: In how many different ways can the letters of the word 'ABYSMAL' be arranged ? 1526 0

  • 1
    5040
    Correct
    Wrong
  • 2
    3650
    Correct
    Wrong
  • 3
    4150
    Correct
    Wrong
  • 4
    2520
    Correct
    Wrong
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Answer : 4. "2520"
Explanation :

Answer: D) 2520 Explanation: Total number of letters in the word ABYSMAL are 7   Number of ways these 7 letters can be arranged are 7! ways   But the letter is repeated and this can be arranged in 2! ways   Total number of ways arranging ABYSMAL = 7!/2! = 5040/2 = 2520 ways.

Q: Which was the first Hydel power projects in India? 1526 0

  • 1
    Paikara in Tamilnadu
    Correct
    Wrong
  • 2
    Nizamsagar in Telangana
    Correct
    Wrong
  • 3
    Siva Samudram in Karnataka
    Correct
    Wrong
  • 4
    Palli vasal in Kerela
    Correct
    Wrong
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Answer : 3. "Siva Samudram in Karnataka"
Explanation :

Answer: C) Siva Samudram in Karnataka Explanation: Siva Samudram in Karnatka. The potential for hydroelectric power in India is one of the greatest in the world.   The first hydro-electric power station in India was established in Karnataka at "shivana samudra".

Q: A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent ? 1526 0

  • 1
    10 days
    Correct
    Wrong
  • 2
    14 days
    Correct
    Wrong
  • 3
    11 days
    Correct
    Wrong
  • 4
    9 days
    Correct
    Wrong
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Answer : 1. "10 days"
Explanation :

Answer: A) 10 days Explanation: For 30 days he receives 30 x 25 = 750                Actually he gets 425 Therefore, Fine is 750 - 425 =  325   => No of days absent = 325/(25+7.50)= 10

Q: In a race of 200 m, A can beat B by 31 m and C by 18 m. In a race of 350 m, C will beat B by ? 1526 0

  • 1
    25 m
    Correct
    Wrong
  • 2
    21 m
    Correct
    Wrong
  • 3
    22 m
    Correct
    Wrong
  • 4
    19 m
    Correct
    Wrong
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Answer : 1. "25 m"
Explanation :

Answer: A) 25 m Explanation: A:B = 200 : 169A:C = 200 : 182 CB = CA×AB    182200×200169   => 182:169   When C covers 182 m , B Covers 169 mWhen C covers 350 m , B Covers 169182×350=> 325 m       So C beats B by (350 - 325) = 25 m.

Q: 5/8 as a Decimal Equals To 1526 0

  • 1
    0.625
    Correct
    Wrong
  • 2
    0.541
    Correct
    Wrong
  • 3
    0.258
    Correct
    Wrong
  • 4
    0.147
    Correct
    Wrong
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Answer : 1. "0.625"
Explanation :

Answer: A) 0.625 Explanation: 5/8 is Nothing but to divide 5 into 8 parts.     As 5 is smaller than 8, the quotient starts with a decimal point to make 5 as 50 to be divisible by 8. (0.)     Now 50 goes for 6 times in 8 leaving a remainder 2. (0.6)      Again 2 is smaller than 8, As it already has decimal point in the quotient, now 2 becomes 20.      Now 20 goes for 2 times in 8 leaving a remainder 4. (0.62)      Again 4 is smaller than 8, As it already has decimal point in the quotient, now 4 becomes 40.     Now 40 goes for 5 times in 8 leaving a remainder 0. (0.625)     Therefore, the decimal value of 58 is 0.625.   Now find a decimal value of 1117 and Discuss your at Discuss.

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