GRE प्रश्न और उत्तर का अभ्यास करें

प्र: If a number 72k23l is divisible by 88. Then find value of k and l ? 2523 0

  • 1
    k=8 & l=2
    सही
    गलत
  • 2
    k=7 & l=2
    सही
    गलत
  • 3
    k=8 & l=3
    सही
    गलत
  • 4
    k=7 & l=1
    सही
    गलत
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उत्तर : 2. "k=7 & l=2"
व्याख्या :

Answer: B) k=7 & l=2 Explanation: If a number to be divisile by 88, it should be divisible by both "8" and "11" Check for '8' :For a number to be divisible by "8", the last 3-digit should be divisible by "8"Here 72x23y --> last 3-digit is '23y'So y=2 [ (i.e) 232 is absolutely divisible by "8"] Chech for '11' :For a number to be divisible by "11" , sum of odd digits - sum of even digits should be divisible by "11"(7 + x + 3) - (2 + 2 + y)(7 + x + 3) - (2 + 2 + 2)(10 + x) - 6 should be divisible by "11"for x = 7=> 17 - 6 = 11 [ which is absolutely divisible by "11"] So x = 7 , y= 2.

प्र: Fill in the blanks with suitable prepositions from the given options. The dog was sitting _______ the table waiting _______ catch the ball that was thrown ________ him _________ his master. 2515 0

  • 1
    below, for, to, by
    सही
    गलत
  • 2
    under, for, towards, by
    सही
    गलत
  • 3
    up, to, towards, by
    सही
    गलत
  • 4
    under, to, towards, by
    सही
    गलत
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उत्तर : 4. "under, to, towards, by"
व्याख्या :

Answer: D) under, to, towards, by Explanation: The dog was sitting under the table waiting to catch the ball that was thrown towards him by his master.

प्र: Rajesh rows in still water with a speed of 4.5 kmph to go to a certain place and comes back. Find his average speed for the whole journey, if the river is flowing with a speed of 1.5 kmph? 2513 0

  • 1
    2 kmph
    सही
    गलत
  • 2
    4 kmph
    सही
    गलत
  • 3
    6 kmph
    सही
    गलत
  • 4
    8 kmph
    सही
    गलत
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उत्तर : 2. "4 kmph"
व्याख्या :

Answer: B) 4 kmph Explanation: Let the distance in one direction = k kms Speed in still water = 4.5 kmph Speed of river = 1.5 Hence, speed in upstream = 4.5 - 1.5 = 3 kmph Speed in downstream = 4.5 + 1.5 = 6 kmph Time taken by Rajesh to row upwards = k/3 hrs Time taken by Rajesh to row downwards = k/6 hrs Now, required Average speed =Total distanceTotal speed = 2kk3 + k6 = 2k x 186k + 3k = 4 kmph    Therefore, the average speed of the whole journey = 4kmph.

प्र: FRIEND : FPIBNZ :: PATRON : ? 2509 0

  • 1
    PTYOPI
    सही
    गलत
  • 2
    PYTOPJ
    सही
    गलत
  • 3
    PYTOOJ
    सही
    गलत
  • 4
    PYTPOJ
    सही
    गलत
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उत्तर : 3. "PYTOOJ"
व्याख्या :

Answer: C) PYTOOJ Explanation: FRIEND : FPIBNZ Follows a pattern that, F - F R- second letter to left of R i.e, P I - I E - Third letter to left of E i.e, B N - N D - Fourth letter to left of D i.e, Z Similarly, for PATRON  P - P A -  second letter to left of A i.e, Y T - T R - Third letter to left of R i.e, O O - O N - Fourth letter to left of N i.e, J PATRON : PYTOOJ   Therefore, FRIEND : FPIBNZ :: PATRON : PYTOOJ

प्र: What is the place value of 6 in 64? 2508 0

  • 1
    6
    सही
    गलत
  • 2
    60
    सही
    गलत
  • 3
    64
    सही
    गलत
  • 4
    10
    सही
    गलत
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उत्तर : 2. "60"
व्याख्या :

Answer: B) 60 Explanation: We know that, ● Each digit has a fixed position called its place. ● Each digit has a value depending on its place called the place value of the digit. ● The face value of a digit for any place in the given number is the value of the digit itself ● Place value of a digit = (face value of the digit) × (value of the place).   Hence, the place value of 6 in 64 = 6 x 10 = 60.

प्र: Rajan's present age is three times his daughter's and nine-thirteenth of his mother's present age. The sum of the present ages of all three of them is 125 years. What is the difference between the present ages of Rajan's daughter and Rajan's mather ? 2504 0

  • 1
    32 years
    सही
    गलत
  • 2
    48 years
    सही
    गलत
  • 3
    62 years
    सही
    गलत
  • 4
    50 years
    सही
    गलत
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उत्तर : 4. "50 years"
व्याख्या :

Answer: D) 50 years Explanation: Let Rajan's present age be 'x' years.=> Then his daughter's present age is = x/3 years.His mother's present age = 13x/9 yearsNow, according to the question,x + x/3 + 13x/9 = 125=> x = 125x9/25 = 45Therefore, required difference = 13x/9 - x/3 = 13x - 3x/9 = 10x/9=> 10 x 45/9 = 50 years.

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उत्तर : 3. "None follows"
व्याख्या :

Answer: C) None follows Explanation:

प्र: How much does a clock lose per day, if its hands coincide ever 65 minutes ? 2502 0

  • 1
    1440/143 min
    सही
    गलत
  • 2
    184/13 min
    सही
    गलत
  • 3
    1425/18 min
    सही
    गलत
  • 4
    541/9 min
    सही
    गलत
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उत्तर : 3. "1425/18 min"
व्याख्या :

Answer: C) 1425/18 min Explanation: 55 min. spaces are covered in 60 min.60 min. spaces are covered in ((60/55) x 60) min = 720/11 min.Loss in 65 min. = (720/11 - 65 ) = 5/11Loss in 24 hrs = (5/11 x 1/65 x 24 x 60)min = 1440/143 min.

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