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नवीनतमलोकप्रियमूल्यांकनपेज देखें 346 of 425कुल सवाल 3400 जॉइन Examsbook

प्र: The solution of 3(2u + v) = 7 uv and 3(u + 3v) = 11 uv is _____ 1410 0

  • 1
    u = 1, v = 0
    सही
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  • 2
    u = 1, v = 3/2
    सही
    गलत
  • 3
    u = 0, v = 3/4
    सही
    गलत
  • 4
    u = 0, v = 1
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उत्तर : 2. "u = 1, v = 3/2"
व्याख्या :

Answer: B) u = 1, v = 3/2 Explanation: Using Trial and error method, From the options  u = 1, v = 3/2 satisfies both the equations.

प्र: The age of Manisha and Sudeshna are in the ratio of 5 : 6 respectively. After 8 years the ratio  of their ages will be 7 : 8. What is the difference of their ages ? 1410 0

  • 1
    6
    सही
    गलत
  • 2
    4
    सही
    गलत
  • 3
    8
    सही
    गलत
  • 4
    10
    सही
    गलत
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उत्तर : 2. "4"
व्याख्या :

Answer: B) 4 Explanation: Let the age of Manisha and Sudeshna is 5x and 6x years respectively. According to the given data, 5x+8/6x+8 = 7/8 42x + 56 = 40x + 64 x = 4 Required Difference of their ages = (6 × 4)  –  (5 × 4) = 4 years.

प्र: 'Brothers and sisters, I have none. But that man's father is my father's son'.How I and that man are related respectively? 1410 0

  • 1
    Father & Son
    सही
    गलत
  • 2
    Brothers
    सही
    गलत
  • 3
    Son & Father
    सही
    गलत
  • 4
    Nephews
    सही
    गलत
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उत्तर : 1. "Father & Son"
व्याख्या :

Answer: A) Father & Son Explanation: Given that man's father is my father's son => Me because i have no brothers => Mans father is me. Hence, that man is my Son.

प्र: Two candidates fought in a municipality election. One of them got 54% of the total votes pooled and won by 1080 votes. What was the total number of votes polled ? 1409 0

  • 1
    12000
    सही
    गलत
  • 2
    13500
    सही
    गलत
  • 3
    15400
    सही
    गलत
  • 4
    11000
    सही
    गलत
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उत्तर : 2. "13500"
व्याख्या :

Answer: B) 13500 Explanation: Given in municipality election 54% votes have won by 1080   Let the total number of votes be x.    54x100 - 46x100 = 1080   8x = 108000   x = 13,500   Therefore, total number of votes = 13,500.

प्र: A,B,C can complete a work in 15,20 and 30 respectively.They all work together for two days then A leave the work,B and C work some days and B leaves 2 days before completion of that work.how many days required to complete the whole work? 1409 0

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उत्तर :
व्याख्या :

Given A,B,C can complete a work in 15,20 and 30 respectively. The total work is given by the LCM of 15, 20, 30 i.e, 60. A's 1 day work = 60/15 = 4 units B's 1 day work = 60/20 = 3 units C's 1 day work = 60/30 = 2 units (A + B + C) worked for 2 days = (4 + 3 + 2) 2 = 18 units  Let B + C worked for x days = (3 + 2) x = 5x units C worked for 2 days = 2 x 2 = 4 units Then, 18 + 5x + 4 = 60 22 + 5x = 60 5x = 38 x = 7.6   Therefore, total number of days taken to complete the work = 2 + 7.6 + 2 = 11.6 = 11 3/5 days.

प्र: Antonym of:: Amicable 1408 0

  • 1
    Hostile
    सही
    गलत
  • 2
    Loveable
    सही
    गलत
  • 3
    Friendly
    सही
    गलत
  • 4
    Peaceful
    सही
    गलत
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उत्तर : 1. "Hostile"
व्याख्या :

Answer: A) Hostile Explanation: Amicable means Friendly or in Loveable, peaceful sense. Then Antonyms for Amicable are Opposite of Friendly => Unfriendly, Hostile, Unpeaceful, etc...

प्र: A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present ? 1408 0

  • 1
    36 yrs
    सही
    गलत
  • 2
    38 yrs
    सही
    गलत
  • 3
    40 yrs
    सही
    गलत
  • 4
    42 yrs
    सही
    गलत
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उत्तर : 3. "40 yrs"
व्याख्या :

Answer: C) 40 yrs Explanation: Let the mother's present age be x years. Then, the person's present age = 2/5 x years. (2x/5 + 8) = 1/2 (x + 8) 2(2x + 40) = 5(x + 8) => x = 40.

प्र: Calculate the number of bricks, each measuring 25 cm x 15 cm x 8 cm required to construct a wall of dimensions 10 m x 4 m x 5 m when 10% of its volume is occupied by concrete ? 1408 0

  • 1
    6000
    सही
    गलत
  • 2
    5400
    सही
    गलत
  • 3
    3800
    सही
    गलत
  • 4
    4700
    सही
    गलत
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उत्तर : 1. "6000"
व्याख्या :

Answer: A) 6000 Explanation: Let 'B' be the nuber of bricks. => 10 x 4/100 x 5 x 90/100 = 25/100 x 15/100 x 8/100 x B => 10 x 20 x 90 = 15 x 2 x B => B = 6000

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