CAT प्रश्न और उत्तर का अभ्यास करें

प्र: 5/9 of the part of the population in a village are females. If 30 % of the females are married. The percentage of unmarried males in the total males is ? 1575 0

  • 1
    62.5 %
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  • 2
    125 %
    सही
    गलत
  • 3
    84.32 %
    सही
    गलत
  • 4
    46.87 %
    सही
    गलत
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उत्तर : 1. "62.5 %"
व्याख्या :

Answer: A) 62.5 % Explanation: Let total population = p number of females = 5p/9number of males =(p-5p/9) = 4p/9married females = 30% of 5p/9 = 30x5p/100x9 = p/6married males = p/6unmarried males =(4p/9-p/6) = 5p/18Percentage of unmarried males in the total males = {(5p/18)/4p/9}x100 = (5p/18)x(9/4p) = 125/2 % = 62.5%

प्र: The top and bottom of a tower were seen to be at angles of depression 30° and 60° from the top of a hill of height 100 m. Find the height of the tower ? 1996 1

  • 1
    42.2 mts
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    गलत
  • 2
    33.45 mts
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    गलत
  • 3
    66.6 mts
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    गलत
  • 4
    58.78 mts
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    गलत
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उत्तर : 3. "66.6 mts"
व्याख्या :

Answer: C) 66.6 mts Explanation: From above diagramAC represents the hill and DE represents the tower Given that AC = 100 m angleXAD = angleADB = 30° (∵ AX || BD ) angleXAE = angleAEC = 60° (∵ AX || CE) Let DE = h Then, BC = DE = h, AB = (100-h) (∵ AC=100 and BC = h), BD = CE tan 60°=AC/CE => √3 = 100/CE =>CE = 100/√3 ----- (1) tan 30° = AB/BD => 1/√3 = 100−h/BD => BD = 100−h(√3)∵ BD = CE and Substitute the value of CE from equation 1 100/√3 = 100−h(√3) => h = 66.66 mts The height of the tower = 66.66 mts.

प्र: A sum of Rs. 427 is to be divided among A, B and C in such a way that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal. The share of C is ? 5522 0

  • 1
    64
    सही
    गलत
  • 2
    76
    सही
    गलत
  • 3
    84
    सही
    गलत
  • 4
    98
    सही
    गलत
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उत्तर : 3. "84"
व्याख्या :

Answer: C) 84 Explanation: Given total sum = Rs. 427And given that 3 times A’s share, 4 times B’s share and 7 times C’s share are all equal.=> 3A = 4B = 7CBut given=> A + B + C = 427Now express A and B in terms of C i.e=> (7C/3) + (7C/4) + C = 427=> C = 84

प्र: In a class of students, if 1 is absent rest of people can be divided into 6 equal parts and if 2 are absent rest of them are divided into 7 equal parts, how many students are present in the class ? 5986 0

  • 1
    28
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  • 2
    19
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    गलत
  • 3
    57
    सही
    गलत
  • 4
    37
    सही
    गलत
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उत्तर : 4. "37"
व्याख्या :

Answer: D) 37 Explanation: Let the number of students in the class be 'x'.Given if 1 is absent rest of people can be divided into 6 equal parts i.e (x-1)/6.........(1)And given if 2 are absent rest of people can be divided into 7 equal parts i.e (x-2)/7.....(2)From (1)&(2), we getx-1/6 = ((x-2)/7) + 1=> x = 37.

प्र: The sum of the interior angles of a polygon is twice the sum of its exterior angles. How many sides does the polygon have ? 1524 0

  • 1
    6
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  • 2
    4
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  • 3
    5
    सही
    गलत
  • 4
    7
    सही
    गलत
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उत्तर : 1. "6"
व्याख्या :

Answer: A) 6 Explanation: We know that Sum of Interior angles of Polygon = 180(n-2)Sum of Exterior angles of Polygon = 360so 180(n-2)=2x360Therefore, by solving we get n=6 sides.

प्र: The percentage discount offered for "Buy 6 get 1 free is" ? 2562 0

  • 1
    85.78 %
    सही
    गलत
  • 2
    58. 48 %
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    गलत
  • 3
    19.25 %
    सही
    गलत
  • 4
    14.285 %
    सही
    गलत
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उत्तर : 4. "14.285 %"
व्याख्या :

Answer: D) 14.285 % Explanation: Total Items = 7Discounted = 1Percentage = 1/7 x 100= 14.285%

प्र: Ram and Raj start a business with investments of Rs. 2500 and Rs. 2250 respectively. After 2 months, Ram takes out Rs.1250 from his capital. After 1 more month, Raj takes out Rs.750 of his capital while Rakesh joins them with a capital of Rs. 3500. At the end of 6 months, they earn a profit of Rs. 2540. Which of the following is the share of each member in the profit ? 2763 0

  • 1
    Ram - Rs. 800, Raj - Rs. 900, Rakesh - Rs. 840
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  • 2
    Ram - Rs. 900, Raj - Rs. 800, Rakesh - Rs. 840
    सही
    गलत
  • 3
    Ram - Rs. 840, Raj - Rs. 920, Rakesh - Rs. 840
    सही
    गलत
  • 4
    Ram - Rs. 800, Raj - Rs. 900, Rakesh - Rs. 940
    सही
    गलत
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उत्तर : 1. "Ram - Rs. 800, Raj - Rs. 900, Rakesh - Rs. 840"
व्याख्या :

Answer: A) Ram - Rs. 800, Raj - Rs. 900, Rakesh - Rs. 840 Explanation: Initial investment of Ram = Rs.2500.After 2 months he withdraw Rs.1250 from his capital.Therefore, we have, Ram invested Rs.2500 for 2 months and Rs.(2500-1250=) 1250 for 4 months. Raj invested Rs. 2250 for 3 months and Rs.(2250-750=) 1500 for 3 months. And, Rakesh invested Rs.3500 for 3 months; Their investing ratio:Ram:Raj:Rakesh = (2500x2 + 1250x4):(2250x3 + 1500x3):(3500x3)= (10,000):(11,250):(10,500) = 1000:1125:1050 = 40:45:42 Total profit for 6 months = Rs.2540Therefore, Ram's share = Rs.(2540 x 40/(40+45+42)) = Rs.(2540 x 40/127) = Rs.800Raj's share = Rs.(2540 x 45/127) = Rs.900Rakesh's share = Rs.(2540 x 42/127) = Rs.840

प्र: If CGKQW is one sequence following a logic, and another five-letter sequence following similar type of logic is BFJPV, then one more variation of this type can be ? 1754 0

  • 1
    VPCFT
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    गलत
  • 2
    DHLRX
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    गलत
  • 3
    CFKNT
    सही
    गलत
  • 4
    None
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    गलत
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उत्तर : 2. "DHLRX"
व्याख्या :

Answer: B) DHLRX Explanation: The logic behind the sequence given in the question is +4, +4, +6, +6Therefore, the sequence which follows the same logic in the given options is DHLRX.

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