GRE Practice Question and Answer

Q: What is the first step in Photosynthesis? 2404 1

  • 1
    Formation of ATP
    Correct
    Wrong
  • 2
    Joining of 3-carbon atom to form glucose
    Correct
    Wrong
  • 3
    Ionization of water
    Correct
    Wrong
  • 4
    Excitement of an electron of chlorophyll photon of light
    Correct
    Wrong
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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: Solve the Puzzle? 2401 0

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Answer :
Explanation :

From the assumption and trial and error method, last three digits sum must leave the same digit as the answer. It is possible only if the answer must be units digit number leaving tens digit as carry. And the possible 3rd digit is 5. Since 5 + 5 + 5 = 15  Now, 2nd step is  1 + x + x + x = 5 => 3x = 4 It is possible with x = 8. 8 + 8 + 8 + 1 = 25 leaving 2 as carry.  Now, 3rd step is 2 + x + x + x = 5 => x = 1   Hence, the three dgits are 1, 8, 5. 185 + 185 + 185 = 555.

Q: Fuse Wire is Made of? 2401 0

  • 1
    an alloy of Tin and Lead
    Correct
    Wrong
  • 2
    Nickel
    Correct
    Wrong
  • 3
    Copper
    Correct
    Wrong
  • 4
    an alloy of Nickel and Lead
    Correct
    Wrong
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Answer : 1. "an alloy of Tin and Lead"
Explanation :

Answer: A) an alloy of Tin and Lead Explanation: Fuse Wire is Made of an alloy of Tin and Lead.   If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit. Thefuse element is made of an alloy of Tin and Lead to provide stable and predictable characteristics.

Q: In a certain Business, the profit is 220% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit ? 2395 0

  • 1
    61%
    Correct
    Wrong
  • 2
    75%
    Correct
    Wrong
  • 3
    55%
    Correct
    Wrong
  • 4
    81%
    Correct
    Wrong
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Answer : 1. "61%"
Explanation :

Answer: A) 61% Explanation: Let C.P.= Rs. 100. Then, Profit = Rs.220,  S.P. = Rs.320.   New C.P. = 125% of Rs. 100 = Rs. 125  New S.P. = Rs.320. Profit = Rs. (320 - 125) = Rs. 195   Required percentage = 195320×100== 60.9 =~ 61%

Q: How many Teaspoons in a Tablespoon? 2393 1

  • 1
    4
    Correct
    Wrong
  • 2
    5
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 4. "3"
Explanation :

Answer: D) 3 Explanation: Tablespoon > Teaspoon In US & UK, 1 Tablespoon = 3 Teaspoons.

Q: A number is increased by 20% and then decreased by 20%, the final value of the number is ? 2391 0

  • 1
    increase by 2%
    Correct
    Wrong
  • 2
    decrease by 3%
    Correct
    Wrong
  • 3
    decrease by 4%
    Correct
    Wrong
  • 4
    increase by 5%
    Correct
    Wrong
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Answer : 3. "decrease by 4%"
Explanation :

Answer: C) decrease by 4% Explanation: Here, x = 20 and y = - 20Therefore, the net % change in value=x + y + xy100 %= 20 + -20 + 20 × -20100%  or  - 4% Since the sign is negative, there is a decrease in value by 4%.

Q: 19 C in a CB 2386 0

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Answer :
Explanation :

19 C in a CB means 19 Coins in a Carrom Board. We have 9 white coins, 9 black coins and one red coin in a carrom board.

Q: 11 P in a CT 2385 0

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Answer :
Explanation :

11 P in a CT means 11 Players in a Cricket Team.

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