IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: If watches bought at prices ranging from Rs. 200 to Rs. 350 are sold at prices ranging from Rs. 300 to Rs. 425. What is the greatest possible profit that might be made in selling nine watches ? 2074 0

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    Rs. 1800
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  • 2
    Rs. 2000
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  • 3
    Rs. 2025
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  • 4
    Rs. 1750
    सही
    गलत
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उत्तर : 3. "Rs. 2025"
व्याख्या :

Answer: C) Rs. 2025 Explanation: Profit would be maximum if watches are brought for Rs. 200 and sold for Rs. 425Profit = Rs. (425 - 200) = Rs. 225Profit of 9 watches = Rs. 225 x 9 = Rs.2,025.

प्र: In a class, seven students are standing in a row. Q is standing left to R but right to P. O is standing right to N and left to P. Similarly, S is standing right to R and left to T. Find out who is standing in the middle ? 2074 0

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    Q
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  • 2
    R
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  • 3
    P
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  • 4
    S
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उत्तर : 1. "Q"
व्याख्या :

Answer: A) Q Explanation: As from the given conditions;Order is N O P Q R S THere the student standing in the middle is 'Q'.

प्र: The largest 4 digit number exactly divisible by 88 is ? 2073 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: There are six persons 1, 2, 3, 4, 5 and 6. 3 is the sister of 6. 2 is the brother of 5's husband. 4 is the father of 1 and grandfather of 6. There are two fathers, three brothers and a mother in the group. Which of the following is a group of brothers ? 2072 0

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    1, 2, 3
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  • 2
    3, 2, 6
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  • 3
    1, 2, 4
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  • 4
    1, 2, 6
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उत्तर : 4. "1, 2, 6"
व्याख्या :

Answer: D) 1, 2, 6 Explanation: 4 is father of 1 and grandfather of 6. So, 1 is father of 6. Thus, 4 and 1 are the two fathers. 3 is the sister of 6. So, 3 is the daughter of 1. Since there is only one mother, it is evident that 5 is the wife of 1 and hence the mother of  3 and 6. So, 2 is brother of 1. There are three brothers. So, 6 is the brother of 3. Hence, 2 and 1 are brothers. 6 is the brother of 3. So, three brothers are 1, 2, 6.

प्र: The book " The Vijay Mallya Story " has been written by _____ 2069 0

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    Vijay Mallya
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  • 2
    Gopinath
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  • 3
    Giriprakash
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  • 4
    Siddharth Mallya
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उत्तर : 3. "Giriprakash"
व्याख्या :

Answer: C) Giriprakash Explanation:

प्र: What are three characteristics of the agricultural revolution? 2069 0

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    Farmers learned to control water through wells and canals
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  • 2
    New tools made it possible for more crops to be grown
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  • 3
    Crop rotation was invented, making it harder on soil
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  • 4
    All the above
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उत्तर : 4. "All the above"
व्याख्या :

Answer: D) All the above Explanation:

प्र: Which of the following causes tornadoes? 2069 0

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    condensation
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  • 2
    dry climates
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  • 3
    wind shear
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  • 4
    stationary fronts
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उत्तर : 2. "dry climates"
व्याख्या :

Answer: B) dry climates Explanation: Conditions suitable for the formation of a tornado develop when varying temperatures and humidity come together and form thunderclouds. This refers to the presence of warm and moist condition in the lower atmosphere and cold and dry conditions in the upper atmosphere. The place where these varying masses of air meet is known as the dry-line. Such conditions, which are suitable for the formation of a tornado, are most often observed just before a low pressure system develops.   Once the ideal conditions occur, the warm air tries to rise in the atmosphere, while the cold air blocks it. This makes the air in between rotate horizontally. In the meanwhile, the land is heated by the Sun, and hence, the air near the ground becomes warm and starts rising. Continuous fueling by the heat energy from the Sun ensures that the warm air has an upper hand over cold air. As a result of this, the cold air at the top starts sinking and the warm air below starts rising in a spinning motion. As the amount of warm air increases, the formation gains height and becomes intense. The intensity of these devastating tornadoes is such that they can clear off anything that comes in their path.

प्र: Microphone : Loud :: Microscope : ? 2069 0

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    Investigate
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  • 2
    Magnify
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  • 3
    Examine
    सही
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  • 4
    Elongate
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उत्तर : 2. "Magnify"
व्याख्या :

Answer: B) Magnify Explanation: As Microphone makes sound louder similarly Microscope makes the object magnified.   Hence, Microphone : Loud :: Microscope : Magnify.

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