Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: Three friends had dinner at a restaurant. When the bill was received, Akshitha paid 2/3 as much as Veena paid and Veena paid 1/2 as much as Lasya paid. What fraction of the bill did Veena pay ? 1843 0

  • 1
    11/3
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  • 2
    2/13
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  • 3
    3/11
    सही
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  • 4
    13/4
    सही
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उत्तर : 3. "3/11"
व्याख्या :

Answer: C) 3/11 Explanation: Let Veena paid x,so Akshitha paid 2x/3 , and Lasya paid 2x,So total bill paid is given byx+(2x/3) +2x = 1, we geti.e. x = 3/11

प्र: If A1, A2, A3, A4, ..... A10 are speakers for a meeting and A1 always speaks after, A2 then the number of ways they can speak in the meeting is 1842 0

  • 1
    9!
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  • 2
    9!/2
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  • 3
    10!
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  • 4
    10!/2
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उत्तर : 4. "10!/2"
व्याख्या :

Answer: D) 10!/2 Explanation: As A1 speaks always after A2, they can speak only in  1st  to 9th places and    A2 can speak in 2nd to 10 the places only when A1 speaks in 1st place    A2 can speak in 9 places the remaining     A3, A4, A5,...A10  has no restriction. So, they can speak in 9.8! ways. i.e   when A2 speaks in the first place, the number of ways they can speak is 9.8!.   When A2 speaks in second place, the number of ways they can speak is  8.8!.   When A2 speaks in third place, the number of ways they can speak is  7.8!. When A2 speaks in the ninth place, the number of ways they can speak is 1.8!       Therefore,Total Number of ways they can  speak = (9+8+7+6+5+4+3+2+1) 8! = 92(9+1)8! = 10!/2

प्र: If L exceeds K by 30%, then K is less than L by ? 1842 0

  • 1
    14 2/5 %
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  • 2
    23 1/3 %
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  • 3
    20 %
    सही
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  • 4
    16 %
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उत्तर : 2. "23 1/3 %"
व्याख्या :

Answer: B) 23 1/3 % Explanation: K = 100 L = 130130------ 30100------- ? => 23 1/13 %

प्र: In a daily morning walk three persons step off together. their steps measure 75 cm, 80 cm and 85 cm respectively. What is the minimum distance each should walk so that thay can cover the distance in complete steps  ? 1839 0

  • 1
    222 m 44 cm
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  • 2
    204 m
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  • 3
    201 m 21 cm
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  • 4
    208 m
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उत्तर : 2. "204 m"
व्याख्या :

Answer: B) 204 m Explanation: To find the minimum distance, we have to get the LCM of 75, 80, 85 Now, LCM of 75, 80, 85 = 5 x 15 x 16 x 17 = 20400 Hence, the minimum distance each should walk so that thay can cover the distance in complete steps = 20400 cms = 20400/100 = 204 mts.

प्र: A six-digit number is formed by repeating a three-digit number; for example, 404404 or 415415 etc. Any number of this form is always exactly divisible by 1838 0

  • 1
    101
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  • 2
    901
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  • 3
    1001
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  • 4
    789
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उत्तर : 3. "1001"
व्याख्या :

Answer: C) 1001 Explanation: Here by trial and error method, we can obseve that 404404 = 404 x 1001; 415415 = 415 x 1001, etc. So, any number of this form is divisible by 1001.

प्र: Ajay and his wife Reshmi appear in an interview for two vaccancies in the same post. The Probability of Ajay's selection is 1/7 and that of his wife Reshmi's selection is 1/5. What is the probability that only one of them will be selected? 1838 0

  • 1
    5/7
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  • 2
    1/5
    सही
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  • 3
    2/7
    सही
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  • 4
    2/35
    सही
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उत्तर : 3. "2/7"
व्याख्या :

Answer: C) 2/7 Explanation: P( only one of them will be selected) = p[(E and not F) or (F and not E)]   = PE∩F∪F∩E    = PEPF+PFPE    =17×45+15×67=27

प्र: Avanthi’s age is 1/6th of her father’s age. Her father’s age will be twice of Kapil’s age after 10 years. If Kapil’s eighth birthday was celebrated two years ago, then what is Avanthi’s present age ? 1836 0

  • 1
    6 years
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  • 2
    4 years
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  • 3
    7 years
    सही
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  • 4
    None
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उत्तर : 4. "None"
व्याख्या :

Answer: D) None Explanation: As given Kapil's 8th birthday was celebrated 2 years ago, Kapil’s present age = 8 + 2 = 10 years. Father's age is twice of Kapil’s age after 10 years. => F + 10 = 2 (K + 10) = 2 (10+ 10)F = 30years, Avanthi's age =1/6(F) = 30/6 = 5 years.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 1836 0

  • 1
    Rs. 38000
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  • 2
    Rs. 47000
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  • 3
    Rs. 50000
    सही
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  • 4
    Rs. 35000
    सही
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उत्तर : 3. "Rs. 50000"
व्याख्या :

Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

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