Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and 15 as remainder. What is the smaller number  ? 1266 0

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    270
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  • 2
    1270
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  • 3
    350
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  • 4
    720
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उत्तर : 1. "270"
व्याख्या :

Answer: A) 270 Explanation: Let the smallest number be x.Then larger number = (x + 1365)x + 1365 = 6x + 15= 5x = 1350 x = 270Smaller number = 270.

प्र: If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is  ? 1264 0

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    1
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  • 2
    1/2
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  • 3
    0
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  • 4
    3/5
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उत्तर : 2. "1/2"
व्याख्या :

Answer: B) 1/2 Explanation: The number of exhaustive outcomes is 36.Let E be the event of getting an even number on one die and an odd number on the other. Let the event of getting either both even or both odd then = 18/36 = 1/2P(E) = 1 - 1/2 = 1/2.

प्र: 36 identical books must be arranged in rows with the same number of books in each row. Each row must contain at least three books and there must be at least three rows. A row is parallel to the front of the room. How many different arrangements are possible ? 1263 0

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    5
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  • 2
    6
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  • 3
    7
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  • 4
    8
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उत्तर : 1. "5"
व्याख्या :

Answer: A) 5 Explanation: The following arrangements satisfy all 3 conditions. Arrangement 1: 3 books in a row; 12 rows. Arrangement 2: 4 books in a row; 9 rows.Arrangement 3: 6 books in a row; 6 rows.Arrangement 4: 9 books in a row; 4 rows.Arrangement 5: 12 books in a row; 3 rows.   Therefore, the possible arrangements are 5.

प्र: One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn find the probability the card drawn is red. 1258 0

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    2/3
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  • 2
    1/2
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  • 3
    1/52
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  • 4
    13/51
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उत्तर : 2. "1/2"
व्याख्या :

Answer: B) 1/2 Explanation: We know that: When one card is drawn from a pack of 52 cards The numbers of possible outcomes n(s) = 52 We know that there are 26 red cards in the pack of 52 cards⇒ The numbers of favorable outcomes n(E) = 26 Probability of occurrence of an event: P(E)=Number of favorable outcomes/Numeber of possible outcomes=n(E)/n(S) ∴ required probability = 26/52 = 1/2.

प्र: In the following number series, one of the numbers is wrong. Find it out? 77, 79, 76, 81, 75, 85 1257 0

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    79
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  • 2
    81
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  • 3
    75
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  • 4
    85
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उत्तर : 3. "75"
व्याख्या :

Answer: C) 75 Explanation: Here in the given series, it follows a pattern that   77 + 2 = 79   79  - 3 = 76   76 + 5 = 81   81 -  7 = 74   74 + 11 = 85   Consecutive adding and subtracting of prime numbers.   So the wrong number in the given series is 75.

प्र: What is the difference between the number of uneducated females in city P and that of uneducated males in city S ? 1257 0

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    9 lakhs
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  • 2
    6 lakhs
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  • 3
    3 lakhs
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  • 4
    2 lakhs
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उत्तर : 1. "9 lakhs"
व्याख्या :

Answer: A) 9 lakhs Explanation: Educated females in city P = 25 lakhs Uneducated females in city P = 30 - 25 = 5 lakhs Educated males city S = 21 lakhs Educated males in city S = 35 - 21= 14 lakhs Required difference = 14 - 5 = 9 lakhs

प्र: Train K crosses a stationary Train L in 50 seconds and a pole in 20 seconds with the same speed. The length of the Train K is 240 meters. What is the length of stationary Train L ? 1257 0

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    60 mts
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  • 2
    120 mts
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  • 3
    240 mts
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  • 4
    360 mts
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उत्तर : 4. "360 mts"
व्याख्या :

Answer: D) 360 mts Explanation: Speed of the Train K is given by s = d/t = 240/20 = 12 m/sDistance covered by Train K in 50 seconds = 12 x 50 = 600 mts.But it crosses Train L in 50 seconds Therefore, the length of the Train L is = 600 - 240 = 360 mts.

प्र: A tank is filled in eight hours by three pipes K, L and M. Pipe K is twice as fast as pipe L, and L is twice as fast as M. How much time will pipe L alone take to fill the tank ? 1253 0

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    32 hrs
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  • 2
    24 hrs
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  • 3
    28 hrs
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  • 4
    26 hrs
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उत्तर : 3. "28 hrs"
व्याख्या :

Answer: C) 28 hrs Explanation: 1/K + 1/L + 1/M = 1/8 (Given)Also given that K = 2L and L = 2M=> 1/2L + 1/L + 2/L = 1/8=> (1 + 2 + 4)/2L = 1/8=> 2L/7 = 8=> L = 28 hours.

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