IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: The difference of two numbers is 14. Their LCM and HCF are 441 and 7. Find the two numbers ? 2862 0

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    63 and 49
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  • 2
    64 and 48
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  • 3
    62 and 46
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  • 4
    64 and 49
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    गलत
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उत्तर : 1. "63 and 49"
व्याख्या :

Answer: A) 63 and 49 Explanation: Since their HCFs are 7, numbers are divisible by 7 and are of the form 7x and 7y Difference = 14 => 7x - 7y = 14=> x - y = 2 product of numbers = product of their hcf and lcm=> 7x * 7y = 441 * 7=> x * y = 63 Now, we havex * y = 63 , x - y = 2=> x = 9 , y = 7 The numbers are 7x and 7y=> 63 and 49

प्र: If 10 men take 15 days to complete a work. In how many days will 37 men complete the work? 2860 0

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    3 days
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  • 2
    4 days
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  • 3
    5 days
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  • 4
    6 days
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उत्तर : 2. "4 days"
व्याख्या :

Answer: B) 4 days Explanation: Given 10 men take 15 days to complete a work => Total mandays = 15 x 10 = 150 Let the work be 150 mandays. => Now 37 men can do 150 mandays in 150/37 =~ 4 days

प्र: Which city is located on the banks of the river Mula-Mutha? 2850 0

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    Pune
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  • 2
    Nagpur
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  • 3
    Ahmedabad
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  • 4
    Surat
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उत्तर : 1. "Pune"
व्याख्या :

Answer: A) Pune Explanation: The Mula-Mutha is a river in India, formed by the confluence of the Mula and Mutha rivers in the city of Pune, which later meets the Bhima River, which itself later meets the Krishna River and finally emptying to the Bay of Bengal.

प्र: The basic operations performed by a computer are 2835 0

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    Logical operation
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  • 2
    Storage and relative
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  • 3
    Arithmetic operation
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  • 4
    All the above
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उत्तर : 4. "All the above"
व्याख्या :

Answer: D) All the above Explanation: The basic operations performed by a computer are Arithmetic operation, Logical operation and Storage and relative.

प्र: A batsman scores 26 runs and increases his average from 14 to 15. Find the runs to be made if he wants top increasing the average to 19 in the same match ? 2832 0

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    74
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  • 2
    79
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  • 3
    72
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  • 4
    60
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उत्तर : 1. "74"
व्याख्या :

Answer: A) 74 Explanation: Number of runs scored more to increse the ratio by 1 is 26 - 14 = 12To raise the average by one (from 14 to 15), he scored 12 more than the existing average.Therefore, to raise the average by five (from 14 to 19), he should score 12 x 5 = 60 more than the existing average. Thus he should score 14 + 60 = 74.

प्र: What has teeth but cannot bite? 2830 0

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    Comb
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  • 2
    Saw
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  • 3
    Zipper
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  • 4
    Gear
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उत्तर : 1. "Comb"
व्याख्या :

Answer: A) Comb Explanation: Saw, Zipper and Gear have teeth but can bite us. Comb have teeth but cannot bite.

प्र: What is the most important step in prioritizing goals? 2829 0

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    deciding what is most important
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    having multiple tasks lined up for each goal
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  • 3
    determining categories for various goals
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  • 4
    writing a list of goals
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उत्तर : 1. "deciding what is most important"
व्याख्या :

Answer: A) deciding what is most important Explanation: Always prioritize by what's most important to what is less important to us to reach our goals as soon as possible.

प्र: What will come in place of question mark(?) in the following number series ? 6859       5832     ?      4096     3375 2829 0

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    4589
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  • 2
    4913
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  • 3
    5013
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  • 4
    5169
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उत्तर : 2. "4913"
व्याख्या :

Answer: B) 4913 Explanation: The given series follows a pattern that, 19 x 19 x 19 = 6859 18 x 18 x 18 = 5832 17 x 17 x 17 = 4913 16 x 16 x 16 = 4096 15 x 15 x 15 = 3375 So, the missing number in the given series = 4913

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