GRE Practice Question and Answer
8Q: What always works with something in its eye? 1335 05b5cc62fe4d2b4197774b94d
5b5cc62fe4d2b4197774b94d- Show Answer
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Answer :
Explanation :
A Needle works when it has thread in its eye that is in its tiny hole.
Q: What causes brownian motion in colloids? 1334 05b5cc662e4d2b4197774bebb
5b5cc662e4d2b4197774bebb- 1coagulation of particles and the dispersed phasefalse
- 2erratic flashes of lightfalse
- 3molecules of the dispersion medium colliding with dispersed phase particlestrue
- 4All the abovefalse
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Answer : 3. "molecules of the dispersion medium colliding with dispersed phase particles"
Explanation :
Answer: C) molecules of the dispersion medium colliding with dispersed phase particles Explanation: When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement. Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal. This leads to the zig-zag (random) motion of the colloidal particles.
Q: Which is the largest coal producing country in the World? 1332 05b5cc6b9e4d2b4197774d6fd
5b5cc6b9e4d2b4197774d6fd- 1Indiafalse
- 2Chinatrue
- 3Russiafalse
- 4New-zealandfalse
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Answer : 2. "China"
Explanation :
Answer: B) China Explanation: China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.
Q: Sweety is 54 years old and her mother is 80. How many years ago was Sweety's mother three times her age? 1330 05b5cc6bae4d2b4197774d79e
5b5cc6bae4d2b4197774d79e- 120false
- 241true
- 326false
- 433false
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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: In a mixture of milk and water the proportion of water by weight was 75%. If in 60 gm of mixture 15 gm water was added, what would be the percentage of water ? (Weight in gm) 1326 05b5cc73de4d2b4197774f943
5b5cc73de4d2b4197774f943- 180%true
- 270%false
- 375%false
- 462%false
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Answer : 1. "80%"
Explanation :
Answer: A) 80% Explanation: Water in 60 gm mixture=60 x 75/100 = 45 gm. and Milk = 15 gm. After adding 15 gm. of water in mixture, total water = 45 + 15 = 60 gm and weight of a mixture = 60 + 15 = 75 gm. So % of water = 100 x 60/75 = 80%.
Q: The sum of one-half, one-third and one-fourth of a number exceeds the number by 22. The number is 1324 05b5cc73ae4d2b4197774f907
5b5cc73ae4d2b4197774f907- 1264true
- 2284false
- 3215false
- 4302false
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Answer : 1. "264"
Explanation :
Answer: A) 264 Explanation: Let the number be 'x'. Then, from given data x/2 + x/3 + x/4 = x+2213x/12 = x+22x = 264
Q: Which one of the following foreign agencies will assist the municipal agencies to improve quality of municipal schools through its School Excellence Programmes(SEP) ? 1322 05b5cc761e4d2b4197774fd53
5b5cc761e4d2b4197774fd53- 1IMFfalse
- 2UNDPfalse
- 3ADBtrue
- 4UNICEFfalse
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Answer : 3. "ADB"
Explanation :
Answer: C) ADB Explanation: Asian Development Bank (ADB) announced that it will assist the municipal agencies to improve quality of municipal schools through its School Excellence Programme (SEP).
Q: What has 3 feet but cannot walk? 1321 05b5cc672e4d2b4197774c0cd
5b5cc672e4d2b4197774c0cd- Show Answer
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Answer :
Explanation :
We know that 1 yard = 3 feet. A yardstick which is used for measurement has 3 feet long but it cannot walk.