GATE Practice Question and Answer

Q: Milk and water are mixed in a vessel A as 4:1 and in vessel B as 3:2. For vessel C, if one takes equal quantities from A and B, find the ratio of milk to water in C. 1770 0

  • 1
    1:9
    Correct
    Wrong
  • 2
    9:1
    Correct
    Wrong
  • 3
    3:7
    Correct
    Wrong
  • 4
    7:3
    Correct
    Wrong
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Answer : 4. "7:3"
Explanation :

Answer: D) 7:3 Explanation: Ratio of Milk and water in a vessel A is 4 : 1   Ratio of Milk and water in a vessel B is 3 : 2   Ratio of only milk in vessel A = 4 : 5   Ratio of only milk in vessel B = 3 : 5   Let 'x' be the quantity of milk in vessel C   Now as equal quantities are taken out from both vessels A & B   => 4/5     :     3/5               x   3/5-x          x - 4/5   => 35-xx-45 = 11 (equal quantities)   => x = 7/10   Therefore, quantity of milk in vessel C  = 7   => Water quantity = 10 - 7 = 3   Hence the ratio of milk & water in vessel 3 is 7 : 3

Q: Manisha went to shop with certain amount, with which she can buy 50 Chacobar or 40 Fivestar. She uses 10% amount for petrol and out of the remaining balance, she purchases 20 Fivestar and some Chacobar. Find the number of Chacobar she can buy? 1770 0

  • 1
    20
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 1. "20"
Explanation :

Answer: A) 20 Explanation: Let the total amount be 200 {L.C.M of 40 and 50} Chacobar C.P. = 200/50 = 4 Fivestar C.P = 200/40 = 5 Remaining Money after petrol = [200 - 200×10%] = 180 Remaining money after buying fivestars = [180 - 20×5] = 80 So number of Chacobar she can buy = 80/4 = 20

Q: What organelle allows some protists to detect light? 1769 0

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Answer :
Explanation :

An organelle called Eyespot allows some protists to detect light. It allows the cells to sense light direction and intensity and respond to it by swimming either towards the light (positive phototaxis) or away from the light (negative phototaxis).   Eyespot is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids.   Eyespot-mediated light perception helps the cells in finding an environment with optimal light conditions for photosynthesis. Eyespots are the simplest and most common "eyes" found in nature, composed of photoreceptors and areas of bright orange-red pigment granules.

Q: What kind of apple isn't an apple? 1767 0

  • 1
    Pineapple
    Correct
    Wrong
  • 2
    Akero apple
    Correct
    Wrong
  • 3
    Adanac apple
    Correct
    Wrong
  • 4
    Aceymac apple
    Correct
    Wrong
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Answer : 1. "Pineapple"
Explanation :

Answer: A) Pineapple Explanation: Except pineapple remaining all three are types of apples. Pineapple is what kind of apple isn't an apple.

Q: 311, 230, 294, ?, 281, 256   What will come in place of the question mark (?) in the above number series? 1767 0

  • 1
    240
    Correct
    Wrong
  • 2
    245
    Correct
    Wrong
  • 3
    244
    Correct
    Wrong
  • 4
    246
    Correct
    Wrong
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Answer : 2. "245"
Explanation :

Answer: B) 245 Explanation: Given 311   230   294   ?   281   256   311 - (9x9) = 230   230 + (8x8) = 294   294 - (7x7) = 245   245 + (6x6) = 281   281 - (5x5) = 256   Hence, the missing number in the given series is 245.

Q: If 2 men and 3 women can do a piece of work in 8 days and 3 men and 2 women in 7 days. In how many days can the work be done by 5 men and 4 women working together? 1766 0

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

Answer: C) 4 days Explanation: From the given data, => (2 M + 3W) 8 = (3M + 2W)7 => 16M + 24W = 21M + 14 W => 10W = 5M => 2W = M => 14W × ? = 7W × 8 ? = 4 days

Q: If 25% of three-seventh of 26% of a number is 145.5, what is the number? 1765 0

  • 1
    4987
    Correct
    Wrong
  • 2
    5784
    Correct
    Wrong
  • 3
    5223
    Correct
    Wrong
  • 4
    4741
    Correct
    Wrong
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Answer : 3. "5223"
Explanation :

Answer: C) 5223 Explanation: Given,    25% of three-seventh of 26% of a number is 145.5   Let the required number be 'N'   i.e, 25100x37x26100xN = 145.5   N = 145.5x7x1000075x26   => N = 5223.07

Q: A, B and C started a business where their initial capital was in the ratio of 2:3:4. At the end of 6 months, A invested an amount such that his total capital became equal to C's initial capital investment. If the annual profit of B is Rs. 3000 then what is the total profit  ? 1765 0

  • 1
    Rs. 8,640
    Correct
    Wrong
  • 2
    Rs. 9,850
    Correct
    Wrong
  • 3
    Rs. 10,000
    Correct
    Wrong
  • 4
    Rs. 11,220
    Correct
    Wrong
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Answer : 3. "Rs. 10,000"
Explanation :

Answer: C) Rs. 10,000 Explanation: Ratio of investments of A, B & C = 2×6+4×6 : 3×12 : 4×12 = 36 : 36 : 48 = 6 : 6 : 8 But given that the annual profit of B is Rs. 3000 => 6 ratio = 3000 Then for the total annual profit of partners is 20 ratio = 3000 x 20/6 = 10,000.

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