Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: Three friends Rudra, Siva and Anvesh start to run around a circular stadium. They complete a revolution in 24, 36 and 30 seconds respectively. After how many minutes will they meet at the starting point ? 1992 0

  • 1
    60
    सही
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  • 2
    120
    सही
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  • 3
    360
    सही
    गलत
  • 4
    6
    सही
    गलत
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उत्तर : 4. "6"
व्याख्या :

Answer: D) 6 Explanation: For this we have to find the LCM of 24, 36 and 30 LCM of 24, 36 and 30 = 360 sec 360/60 min = 6 minutes.

प्र: P alone can do a piece of work in 24 days. The time taken by P to complete one-third of work is equal to time taken by Q to complete half of the work. How many days are required to complete by P and Q working together ? 1644 0

  • 1
    9 3/5 days
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  • 2
    7 days
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  • 3
    6 3/7 days
    सही
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  • 4
    8 days
    सही
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उत्तर : 1. "9 3/5 days"
व्याख्या :

Answer: A) 9 3/5 days Explanation: Let the total work be 'W' As per the given information, P can complete the work 'W' in 24 days. => one day work of P = W/24 And also given that, The time taken by P to complete one-third of work is equal to time taken by Q to complete half of the work => PW/3 = QW/2 => P's 1 day =    W/24    ?    =      W/3 =>  ?  = 24W/3W  = 8 => QW/2 = 8 days => Q alone can complete the work W in 16 days => P + Q can complete the work in 1/24 + 1/16 = 5/48 => 48/5 days = 9 3/5 days.

प्र: Find the missing number in the following Series ? 18, 97, 26, 91, ? , 83 2187 0

  • 1
    32
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  • 2
    36
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  • 3
    30
    सही
    गलत
  • 4
    34
    सही
    गलत
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उत्तर : 4. "34"
व्याख्या :

Answer: D) 34 Explanation: The given series follows the pattern that, 18, 97, 26, 91, ?, 83 => 18 + 8 = 26 => 97 - 8 = 91 => 26 + 8 = 34 => 91 - 8 = 83 Hence, the missing number is 34.

प्र: Sum of the ages of Rajesh, Suresh, Mahesh and Dinesh is 76 years. 7 years hence, their age ratio is 7:6:5:8. Find Mahesh’s present age ? 3001 0

  • 1
    17 years
    सही
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  • 2
    13 years
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  • 3
    14 years
    सही
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  • 4
    16 years
    सही
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उत्तर : 2. "13 years"
व्याख्या :

Answer: B) 13 years Explanation: Given R + S + M + D = 76 => R+7 : S+7 : M+7 : D+7 = 7:6:5:8 => Let the ratio = x => M+7 = 5x => M = 5x-7 => R = 7x-7 => S = 6x-7 => D = 8x-7 => R + S + M + D = 76 => 7x-7 + 6x-7 + 5x-7 + 8x-7 = 76 => 26x - 28 = 76 => 26x = 104 => x = 4 => Mahesh's present age = 5x-7 = 20 - 7 = 13 years.

प्र: Four person A, B, C and D. The sum of their present age is 176. Four years ago ratio of their age was 11: 9 : 6 : 14, then find who is eldest and youngest among them ? 1655 0

  • 1
    A is eldest & C is youngest
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  • 2
    D is eldest & C is youngest
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  • 3
    C is eldest & A is youngest
    सही
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  • 4
    A is eldest & B is youngest
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उत्तर : 2. "D is eldest & C is youngest"
व्याख्या :

Answer: B) D is eldest & C is youngest Explanation: Given sum of present ages of A, B, C & D A + B + C + D = 176 and also given that, (A-4) : (B-4) : (C-4) : (D-4) = 11 : 9 : 6 : 14 Let the ratio = x => A-4 + B-4 + C-4 + D-4 = 11x + 9x + 6x + 14x => (A + B + C + D ) - 16 = 40x => 176 - 16 = 40x => x = 4 => A = 44 + 4 = 48 => B = 40 => C = 28 => D = 60 Therefore, from the above conclusions D is eldest with 60 years and C is youngest with 28 years of ages.

प्र: Find the odd number in the following number series? 24, 4, 13, 41, 151, 640 8912 0

  • 1
    4
    सही
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  • 2
    640
    सही
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  • 3
    41
    सही
    गलत
  • 4
    13
    सही
    गलत
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उत्तर : 3. "41"
व्याख्या :

Answer: C) 41 Explanation: The given number series follows the pattern that,   24×0 + 4  = 4     4×1  + 9   = 13   13×2 + 16 = 42   42×3 + 25  = 151   151×4 + 36 =  640   Therefore, the odd number in the given series is 41

प्र: A certain amount earns simple interest of Rs. 2260 after 3 years. Had the interest been 1 % more how much more interest would it have earned ? 1227 0

  • 1
    Rs. 175
    सही
    गलत
  • 2
    Rs. 220.75
    सही
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  • 3
    Rs. 126
    सही
    गलत
  • 4
    Can't be determined
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उत्तर : 4. "Can't be determined"
व्याख्या :

Answer: D) Can't be determined Explanation: Here given Interest earned = Rs. 2260 Time = 3 years Rate of interest = ? Principal Amount = ? So, it can't be determined.

प्र: What will come in place of the question mark (?) in the following number series  ? 12, 24, 26.5, 79.5, ?, 330 1804 0

  • 1
    211
    सही
    गलत
  • 2
    101.5
    सही
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  • 3
    82.5
    सही
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  • 4
    99
    सही
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उत्तर : 3. "82.5"
व्याख्या :

Answer: C) 82.5 Explanation: The given series    12   24   26.5   79.5   ?   330 follows a pattern that,   12 x 2 = 24   24 + 2.5 = 26.5   26.5 x 3 = 79.5   79.5 + 3 = 82.5   82.5 x 4 = 330   Hence, the missing number is 82.5

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