Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: In how many different ways could couples be picked from 6 men and 9 women ? 1081 0

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    26
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  • 2
    54
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  • 3
    52
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  • 4
    28
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उत्तर : 2. "54"
व्याख्या :

Answer: B) 54 Explanation: Number of mens = 8 Number of womens = 5   Different ways could couples be picked = C16× 9C1 = 9 x 6 = 54 ways.

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उत्तर : 1. "Rs. 60"
व्याख्या :

Answer: A) Rs. 60 Explanation: Price of 1kg fresh cashew = Rs.120Therefore, price of 10kg = Rs.120 x 10 = Rs.1200 10% of 10kg which eaten by rodents = 10 x 10/100 = 1kg. So, End of Year he had 10kg - 1kg = 9kg So, he sells that 9kg with Rs.20 per kg profit = 9 x 140 = 1260. He buy 10kg wooden box with cashew for Rs.1200 and sell that for Rs. 1260 So, profit = 1260 - 1200 = Rs.60 more money he get.

प्र: A does half as much work as Band C does half as much work as A and B together. If C alone can finish the work in 40 days, then together ,all will finish the work in  ? 3114 0

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    17 + 4/7 days
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  • 2
    13 + 1/3 days
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  • 3
    15 + 3/2 days
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  • 4
    16 days
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उत्तर : 2. "13 + 1/3 days"
व्याख्या :

Answer: B) 13 + 1/3 days Explanation: C alone can finish the work in 40 days.As given C does half as much work as A and B together => (A + B) can do it in 20 days(A + B)s 1 days wok = 1/20.A's 1 days work : B's 1 days Work = 1/2 : 1 = 1:2(given)A's 1 day’s work = (1/20) x (1/3) = (1/60) [Divide 1/20 in the raio 1:2]B's 1 days work = (1/20) x (2/3) = 1/30(A+B+C)'s 1 day's work = (1/60) + (1/30) + (1/40) = 9/120 = 3/40 All the three together will finish it in 40/3 = 13 and 1/3 days.

प्र: Evaluate : 3.392-2.6123.39-2.69? 1402 0

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    3
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    4
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  • 3
    6
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  • 4
    1
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उत्तर : 3. "6"
व्याख्या :

Answer: C) 6 Explanation:   It is in the form of a2-b2a-b = a+ba-ba-b = a+b   Here a = 3.39   b = 2.61     = 3.39 + 2.61 = 6.

प्र: Find out the wrong term in the given series of numbers ?6, 15, 35, 77, 165, 221 2132 0

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    35
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  • 2
    165
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  • 3
    221
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  • 4
    77
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उत्तर : 2. "165"
व्याख्या :

Answer: B) 165 Explanation: The given series follow the rule that : Multiplying consecutive prime numbers2,3,5,7,11,13,17,19....2x3 = 63x5 = 155x7 = 357x11 = 7711x13 = 14313x17 = 221So, the wrong term is 165.

प्र: The largest 4 digit number exactly divisible by 88 is ? 1795 0

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    9944
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  • 2
    9768
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  • 3
    8888
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  • 4
    9988
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उत्तर : 1. "9944"
व्याख्या :

Answer: A) 9944 Explanation: The largest 4 digit number is = 9999After dividing 9999 with 88, we get 55 as remainderso largest 4 digit number divisible by 88 = 9999-55 = 9944.

प्र: If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to ? 2121 0

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    13/125
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  • 2
    14/57
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  • 3
    11/120
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  • 4
    16/41
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उत्तर : 3. "11/120"
व्याख्या :

Answer: C) 11/120 Explanation: Let the numbers be a and b.We know that product of two numbers = Product of their HCF and LCMThen, a + b = 55 and ab = 5 x 120 = 600.=> The required sum = (1/a) + (1/b) = (a+b)/ab=55/600 = 11/120

प्र: Last year vivek saved 10% of his annual earnings, this year he earned 5% more than last year and he saved 12% of his annual earnings. The amount saved this year was what percentage of the amount saved last year ? 1917 0

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    87%
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  • 2
    98%
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  • 3
    138%
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  • 4
    126%
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उत्तर : 4. "126%"
व्याख्या :

Answer: D) 126% Explanation: Suppose total earnings = Rs. 1000010% saving = 10000 x (10/100) = Rs. 1000This year 5% more income than prev year = Rs. 1050012% saving = 10500 x (12/100) = Rs. 1260Percentage of amount saved = (1260/1000) x 100 = 126%

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