GATE Practice Question and Answer

Q: An amount doubles itself in 15 years. what is the rate of interest ? 1674 0

  • 1
    7.85 %
    Correct
    Wrong
  • 2
    9.41%
    Correct
    Wrong
  • 3
    6.66 %
    Correct
    Wrong
  • 4
    4.21 %
    Correct
    Wrong
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Answer : 3. "6.66 %"
Explanation :

Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.

Q: Which planet has the lowest density? 1674 0

  • 1
    Earth
    Correct
    Wrong
  • 2
    Jupiter
    Correct
    Wrong
  • 3
    Saturn
    Correct
    Wrong
  • 4
    Neptune
    Correct
    Wrong
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Answer : 3. "Saturn"
Explanation :

Answer: C) Saturn Explanation: Saturn, the solar system's second largest planet that takes the prize for least dense. It's less dense than water, which has led many people to postulate that it would float. However, even if it somehow found its way to a body of water large and deep enough to contain it, Saturn would break apart and its rocky core would sink.

Q: The more you take, the more you leave behind. What is that? 1673 0

  • 1
    Pictures
    Correct
    Wrong
  • 2
    Hole
    Correct
    Wrong
  • 3
    Clothes
    Correct
    Wrong
  • 4
    Footsteps
    Correct
    Wrong
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Answer : 4. "Footsteps"
Explanation :

Answer: D) Footsteps Explanation: Yes, footsteps are what we take more, the more we leave behind.

Q: What will come in place of the question mark(?) in the following question ? 56% of 870 + 82% of 180 = 32% of 90 + ? 1671 0

  • 1
    777
    Correct
    Wrong
  • 2
    666
    Correct
    Wrong
  • 3
    606
    Correct
    Wrong
  • 4
    789
    Correct
    Wrong
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Answer : 3. "606"
Explanation :

Answer: C) 606 Explanation: 56% of 870 = 56x870/100 = 487.20 82% of 180 = 82x180/100 = 147.60 32% of 90 = 32x90/100 487.20 + 147.6 - 28.8  =  ? ? = 634.8  - 28.8 ? = 606.

Q: Absolute value of 9? 1671 0

  • 1
    0
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    -9
    Correct
    Wrong
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Answer : 2. "9"
Explanation :

Answer: B) 9 Explanation: Absolute value of a number : It means that the distance of a number from 0 on a number line.    Here absolute value of 9 is that on a number line 9 is 9 units away from 0. Hence its absolute value is 9. Similarly, absolute value of -9 means -9 is also 9 units away from the 0 on number line. Hence, absolute value of -9 is also 9.   Hence, the absolute value of 9 is 9.

Q: What is the first term of an arithmetic progression of positive integers ? (I) Sum of the squares of the first and the second term is 116. (II)The fifth term is divisible by 7. 1671 0

  • 1
    Only a is sufficient
    Correct
    Wrong
  • 2
    Only b is sufficient
    Correct
    Wrong
  • 3
    Both a & b are necessary
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Only a is sufficient"
Explanation :

Answer: A) Only a is sufficient Explanation: The sum of square of two no is 116 i.e no lie 1-11, because 11x11 =121 which is greater than 116 again after cheaking all possible pair of no only 4 and 10 satisfy this condsn , again the progression is of positive integer so 10 cant not be 1st termso the 1st term is 4,but from the 2nd we cant able to find the 1st term so only 1st statement is sufficient to answer the question

Q: Rolling friction is caused by ____ from the following? 1670 0

  • 1
    Non-elastic effects
    Correct
    Wrong
  • 2
    Gravity
    Correct
    Wrong
  • 3
    Power dissipation
    Correct
    Wrong
  • 4
    Buoyancy
    Correct
    Wrong
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Answer : 1. "Non-elastic effects"
Explanation :

Answer: A) Non-elastic effects Explanation: Rolling friction or rolling drag is the force resisting the motion when a body rolls on a surface. It is mainly caused by non-elastic effects, that is, not all the energy needed for deformation of the wheel, roadbed, etc... is recovered when the pressure is removed. Another cause of rolling resistance lies in the slippage between the wheel and the surface, which dissipates energy.

Q: Number Challenge 1670 0

  • 1
    9
    Correct
    Wrong
  • 2
    11
    Correct
    Wrong
  • 3
    13
    Correct
    Wrong
  • 4
    15
    Correct
    Wrong
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Answer : 2. "11"
Explanation :

Answer: B) 11 Explanation: Half the Product of Number in the upper & lower box gives the number in the middle box. i.e. 18 x 4/2 = 36 15 x 6/2 = 45 In the same way  8 x N/2 = 44 => N = 11.

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