Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

नवीनतमलोकप्रियमूल्यांकनपेज देखें 63 of 159कुल सवाल 1267 जॉइन Examsbook

प्र: One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture. 1979 0

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    27 %
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  • 2
    26 %
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  • 3
    29 %
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  • 4
    21 %
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उत्तर : 1. "27 %"
व्याख्या :

Answer: A) 27 % Explanation: Let the percentage of benzene = X(30 - X)/(X- 25) = 6/4 = 3/2 => 5X = 135  X = 27 So, required percentage of benzene = 27 %

प्र: Buses start from a bus terminal with a speed of 20 km/hr at intervals of 10 minutes. What is the speed of a man coming from the opposite direction towards the bus terminal if he meets the buses at intervals of 8 minutes? 1975 0

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

Answer: A) 5 kmph Explanation: Let p be the speed of man in kmph According to the given data in the question, Distance travelled by bus in 10 min with 20 kmph == Distance travelled by man in 8 min with (20 + p) kmph in opposite direction => 20 x 10/60 = 8/60 (20 + p) => 200 = 160 + 8p => p = 40/8 = 5 kmph.

प्र: The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned  ? 1973 0

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    Rs. 11828.80
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  • 2
    Rs. 19828.80
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  • 3
    Rs. 9828.80
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  • 4
    Rs. 19328.80
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उत्तर : 2. "Rs. 19828.80"
व्याख्या :

Answer: B) Rs. 19828.80 Explanation: Let the sum be Rs. P P{ 1+81002- 1 } = 2828.80   It is in the form of  a2-b2 = a+ba-b   P(8/100)(2 + 8/100) = 2828.80   P = 2828.80 / (0.08)(2.08)   = 1360/0.08 = 17000   Principal + Interest = Rs. 19828.80

प्र: Find out the wrong term in the given series of numbers ?6, 15, 35, 77, 165, 221 1973 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: In a year, Holi was enjoyed on 6th March 9 AM and Deepawali was celebrated on 11th November 8 PM. The total time interval (in hours) between the two was ? 1972 0

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    2101 hrs
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  • 2
    4125 hrs
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  • 3
    5124 hrs
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  • 4
    6011 hrs
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उत्तर : 4. "6011 hrs"
व्याख्या :

Answer: D) 6011 hrs Explanation: From March 6th to November 11th, there are 250 days and Thus 250 x 24 hoursSo from Mar 6th 9AM to Nov 11th 8PM, there will be 250 x 24 + 11 hours = 6011 hrs.

प्र: X can complete the work in 10 days, Y can do the same in 15 days. If they are hired for 5 days to do the work together, what is the work that left unfinished? 1972 0

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

Answer: C) 1/6 Explanation: Given X can do in 10 days  => 1 day work of X = 1/10   Y can do in 15 days  => 1 day work of Y = 1/15   1day work of (X + Y) = 1/10 + 1/15 = 1/6   Given they are hired for 5 days  => 5 days work of (X + Y) = 5 x 1/6 = 5/6  Therefore, Unfinished work = 1 - 5/6 = 1/6

प्र: Three milkmen rented a pasture. A grazed 24 cows for 4 months; B 10 cows for 6 months; C 56 cows for 5 months. If A's share of rent is Rs. 960, find the total rent of the field? 1969 0

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    4530
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    4440
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    4360
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    4280
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उत्तर : 3. "4360"
व्याख्या :

Answer: C) 4360 Explanation: Ratio of shares of A,B,C = (24 x 4) : (10 x 6) : (56 x 5)                                     = 96 : 60 : 280.   Let total rent be Rs. x. Then, A's share = Rs.96x436  ∴96x436=960 ⇔x=960×43696=4360   Hence total rent of the field is Rs. 4360.

प्र: The sale price of an article including the sales tax is Rs. 616. The rate of sales tax is 10%. If the shopkeeper has made a profit of 12%, then the cost price of the article is : 1968 0

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    Rs. 560
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  • 2
    Rs. 530
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  • 3
    Rs. 500
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  • 4
    Rs. 514
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उत्तर : 3. "Rs. 500"
व्याख्या :

Answer: C) Rs. 500 Explanation: 110% of S.P. = Rs. 616 S.P. = (616 x 100)/110 = Rs. 560 C.P = (110 x 560)/112 = Rs. 500

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