GRE Practice Question and Answer
8Q: A single pipe of diameter x has to be replaced by six pipes of diameters 12 cm each. The pipes are used to covey some liquid in a laboratory. If the speed/flow of the liquid is maintained the same then the value of x is ? 1890 05b5cc73ae4d2b4197774f902
5b5cc73ae4d2b4197774f902- 114.69 cmfalse
- 229.39 cmtrue
- 318.65 cmfalse
- 422.21 cmfalse
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Answer : 2. "29.39 cm"
Explanation :
Answer: B) 29.39 cm Explanation: Volume of water flowing through 1 pipe of diameter x = Volume discharged by 6 pipes of diameter 12 cms. As speed is same, area of cross sections should be same. Area of bigger pipe of diameter x = Total area of 6 smaller pipes of diameter 12 i.e πR2 = 6πR12 Here R = R and R1 = 12/2 = 6 ⇒R2 = 6×6×6 R = 14.696 => D = X = 14.696 * 2 = 29.3938 cm.
Q: (3x + 2) (2x - 5) = ax² + kx + n. What is the value of a - n + k ? 1888 05b5cc74fe4d2b4197774fafe
5b5cc74fe4d2b4197774fafe- 14false
- 21false
- 35true
- 43false
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Answer : 3. "5"
Explanation :
Answer: C) 5 Explanation: (3x + 2) (2x - 5) = ax2+kx+n ...............(1) But (3x + 2)(2x - 5) = 6x2-11x-10........(2) so by comparing (1) & (2), we get a= 6, k= -11 , n= -10 (a - n + k) = 6 + 10 - 11 = 5.
Q: One girl can eat 112 chocolates in half a minute, and her boy friend can eat half as many in twice the length of time. How many chocolates can both boy and girl eat in 12 seconds ? 1885 05b5cc745e4d2b4197774fa27
5b5cc745e4d2b4197774fa27- 144false
- 232false
- 356true
- 449false
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Answer : 3. "56"
Explanation :
Answer: C) 56 Explanation: Girl eats 112 chocolates in 30 sec so she can eat in 12 sec is 12 x 112/30 = 44.8 chocolates. Her boy friend can eat one-half of 112 in twice of 30 sec so he can eat 56 in 60 sec Then he can eat in 12 sec is 56 x 12/60 = 11.2 chocolates. Hence, together they can eat = 44.8 + 11.2 =56 chocolates in 12 seconds.
Q: If a man buys 1 lt of milk for Rs.12 and mixes it with 20% water and sells it for Rs.15, then what is the percentage of gain ? 1882 05b5cc74fe4d2b4197774fb12
5b5cc74fe4d2b4197774fb12- 125%true
- 230%false
- 317%false
- 419%false
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Answer : 1. "25%"
Explanation :
Answer: A) 25% Explanation: He has gain = 15 - 12 = 3,Gain% = (3/12) x 100 = (100/4) = 25.He has 25% gain.
Q: What is the first step in Photosynthesis? 1879 15b5cc6a9e4d2b4197774cf0f
5b5cc6a9e4d2b4197774cf0f- 1Formation of ATPfalse
- 2Joining of 3-carbon atom to form glucosefalse
- 3Ionization of waterfalse
- 4Excitement of an electron of chlorophyll photon of lighttrue
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Answer : 4. "Excitement of an electron of chlorophyll photon of light"
Explanation :
Answer: D) Excitement of an electron of chlorophyll photon of light Explanation: The first step in Photosynthesis is Excitement of an electron of chlorophyll photon of light.
Q: If Theresa's daughter is my daughter's mother, what am I to Theresa? 1869 05b5cc6ade4d2b4197774d0e4
5b5cc6ade4d2b4197774d0e4- 1Son-in-lawtrue
- 2Daughter-in-lawfalse
- 3Grand motherfalse
- 4Grand Daughterfalse
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Answer : 1. "Son-in-law"
Explanation :
Answer: A) Son-in-law Explanation: Given that If Theresa's daughter is my daughter's mother It has 2 ways of Answers such that it depends on the sex of me. That is Male or Female. 1) If I am a Male : My daughter's mother is my wife. My wife is Teresa's daughter => I am Teresa's Son-in-law. 2) If I am a Female : My daughter's mother is myself. Myself Teresa's daughter. => I am Teresa's Daughter. But in the given options only Son-in-law is available and daughter is not given. So, Son-in-law is correct.
Q: On a school’s Annual day sweets were to be equally distributed amongst 112 children. But on that particular day, 32 children were absent. Thus the remaining children got 6 extra sweets. How many sweets was each child originally supposed to get ? 1869 05b5cc741e4d2b4197774f9a4
5b5cc741e4d2b4197774f9a4- 114false
- 216false
- 312false
- 415true
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Answer : 4. "15"
Explanation :
Answer: D) 15 Explanation: Let 'K' be the total number of sweets.Given total number of students = 112If sweets are distributed among 112 children,Let number of sweets each student gets = 'L' => K/112 = L ....(1)But on that day students absent = 32 => remaining = 112 - 32 = 80Then, each student gets '6' sweets extra. => K/80 = L + 6 ....(2)from (1) K = 112L substitute in (2), we get112L = 80L + 48032L = 480L = 15 Therefore, 15 sweets were each student originally supposed to get.
Q: Find out which pair of words can be filled up in the blanks in the sentence to make the sentence meaningfully complete. The policy on foreign direct investment in multi- brand retail may be _______ in a political impasse, but big retail chains are using India as sourcing base and making an _________ on local businesses. 1867 05b5cc6c5e4d2b4197774dd55
5b5cc6c5e4d2b4197774dd55- 1Caught, impacttrue
- 2Caught, effectfalse
- 3Fetched, affectfalse
- 4Fetching, impactfalse
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Answer : 1. "Caught, impact"
Explanation :
Answer: A) Caught, impact Explanation: Caught - according to the sentence given caught means to become involved in something, often without wanting to. Impasse - means a situation in which further development is impossible.