GRE Practice Question and Answer
8Q: An Engine length 1000 m moving at 10 m/s. A bird is flying from engine to end with 'x' m/s and coming back at '2x' m/s. Take total time of bird travelling as 187.5 s. Find x and 2x in km/hr ? 1762 05b5cc73de4d2b4197774f911
5b5cc73de4d2b4197774f911- 121.4 and 42.8false
- 225.2 and 50.4false
- 331.4208 and 62.8416true
- 433.12 and 66.24false
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Answer : 3. "31.4208 and 62.8416"
Explanation :
Answer: C) 31.4208 and 62.8416 Explanation: Birds speeds in mtrs/sec is 'x' and '2x' .While flying from Engine to end, relative speed = (x+10) m/secfrom end to engine, flying speed = (2x - 10) mtr/secso 1000/(x+10) + 1000/(2x-10) = 187.5 secssolving it, we getso x = 8.728 m/sec and 2x= 17.456 m/sec x = 31.4208 km/hr and 2x = 62.8416 km/hr.
Q: Which continent has the least countries? 1760 05b5cc672e4d2b4197774c0b9
5b5cc672e4d2b4197774c0b9- 1Africafalse
- 2South Americafalse
- 3Antarcticatrue
- 4Europefalse
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Answer : 3. "Antarctica"
Explanation :
Answer: C) Antarctica Explanation: Africa - 54 countries South America - 12 countries Antarctica - 0 countries Europe - 43 countries. Hence, Antarctica continent has the least countries.
Q: Crack the Logical #MathPuzzle? 1758 05b5cc6bbe4d2b4197774d839
5b5cc6bbe4d2b4197774d839- Show AnswerHide Answer
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Answer :
Explanation :
From given data, Rs. 1 = 40 strawberries => Rs. 2 = 80 strawberries Rs. 5 = 1 apple => Rs. 95 = 19 apple. Rs. 3 = 1 mango => Rs. 3 = 1, mango Now, Total So 100 Rs = 100 Fruits.
Q: Electrical Pressure is also called 1757 05b5cc6afe4d2b4197774d200
5b5cc6afe4d2b4197774d200- 1Currentfalse
- 2Voltagetrue
- 3Resistancefalse
- 4Powerfalse
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Answer : 2. "Voltage"
Explanation :
Answer: B) Voltage Explanation: Electrical Pressure is also called as Voltage. Voltage is measured in Volts. Volt : A unit of electrical pressure or Voltage is called Volt. One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance. Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.
Q: Statement: The air and rail services have been severely disrupted due to thick fog in the northern part of the country.Courses of action:a. The rail and air services should be temporarily suspended in the region.b. People should be advised to make their travel plan keeping in mind the probable disruption resulting in delay or cancellation of services.c. The government should immediately install modern machines which will enable itto guide the rail and air services even if the thick fog develops. 1756 05b5cc76ae4d2b4197774fe7a
5b5cc76ae4d2b4197774fe7a- 1Only a followsfalse
- 2a and b followsfalse
- 3Only b followsfalse
- 4a, b & c followstrue
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Answer : 4. "a, b & c follows"
Explanation :
Answer: D) a, b & c follows Explanation: Keeping in mind the safety and convenience of passengers, both 'a' and 'b' follow. 'c' clearly suggests a remedy to the problem and hence it also follows.
Q: I am a 5 letter word. I am normally below you. If you remove my 1st letter, you'll find me above you. If you remove my 1st & 2nd letters, you can't see me. What am I? 1754 05b5cc69ae4d2b4197774c79c
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Answer :
Explanation :
Firstly, I focussed on "If you remove my 1st & 2nd letters, you can't see me". The first thing that comes to mind which we can’t see is the "AIR". So now, what 4 letter words can be formed ending with "AIR"? Think of all the words from A to Z, considering which one lies above you. That is how we get to "HAIR". Now, which 5 letter word can be formed ending with "HAIR"? Starting with A to Z, we reach "CHAIR" and also, it lies below us. And the required answer is "CHAIR".
Q: A seven letter word containing thousands of letters is what? 1752 05b5cc695e4d2b4197774c519
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Answer :
Explanation :
It is a Postbox or a Mailbox which contains thousands of letters or mails or messages.
Q: On BBC World News channel last night they showed an informative program about new innovations in medical imaging, which you would have found interesting. 1749 05b5cc6a3e4d2b4197774cc1a
5b5cc6a3e4d2b4197774cc1a- 1there was an informative program about innovations in medical imaging, a program you would have found interesting.true
- 2they showed an informative program about innovations in medical imaging, which you would have found interesting.false
- 3there was an informative program about new innovations in medical imaging, that you would have found interesting.false
- 4they showed an informative program about new innovations in medical imaging, which you would have found interesting.false
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Answer : 1. "there was an informative program about innovations in medical imaging, a program you would have found interesting."
Explanation :
Answer: A) there was an informative program about innovations in medical imaging, a program you would have found interesting. Explanation: They is incorrect when talking of the television channel. New is redundant. And which must have a clear antecedent. Hence, Only Option A satisfies and clears all the flaws in the given sentence.