IIT JEE प्रश्न और उत्तर का अभ्यास करें

नवीनतमलोकप्रियमूल्यांकनपेज देखें 103 of 416कुल सवाल 3327 जॉइन Examsbook

प्र: Rajan's present age is three times his daughter's and nine-thirteenth of his mother's present age. The sum of the present ages of all three of them is 125 years. What is the difference between the present ages of Rajan's daughter and Rajan's mather ? 2736 0

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    32 years
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    48 years
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    62 years
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  • 4
    50 years
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उत्तर : 4. "50 years"
व्याख्या :

Answer: D) 50 years Explanation: Let Rajan's present age be 'x' years.=> Then his daughter's present age is = x/3 years.His mother's present age = 13x/9 yearsNow, according to the question,x + x/3 + 13x/9 = 125=> x = 125x9/25 = 45Therefore, required difference = 13x/9 - x/3 = 13x - 3x/9 = 10x/9=> 10 x 45/9 = 50 years.

प्र: Ayush was born two years after his father's marriage. His mother is five years younger than his father but 20 years older than Ayush who is 10 years old. At what age did the father get married ? 2734 0

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    25 years
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    24 years
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    23 years
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    22 years
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उत्तर : 3. "23 years"
व्याख्या :

Answer: C) 23 years Explanation: Ayush's present age = 10 years.His mother's present age = (10 + 20) years = 30 years.Ayush's father's present age = (30 + 5) years = 35 years.Ayush's father's age at the time of Ayush's birth = (35 - 10) years = 25 years. Therefore Ayush's father's age at the time of marriage = (25 - 2) years = 23 years.

प्र: In each question given below four conclusions are followed by statements. You have to take the three given statements to be true (even if they seem to be at variance from the commonly known facts). Read the conclusions and decide which of the following set of statement indicate that conclusion is logically follows. Statements :   1. All chairs are tents.  2. No chairs is jugs. 3. No jugs is glasses.  4. No glasses is pots.   Conclusions :   I. All pots are tents. II. All glasses are chair. III. Some jugs are tents. 2734 0

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    Only conclusion I follows
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    Both conclusion II & III follows
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    None follows
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    Only conclusion II follows
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उत्तर : 3. "None follows"
व्याख्या :

Answer: C) None follows Explanation:

प्र: What is the major monosaccharide found in the body? 2731 0

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    Galactose
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    Sucrose
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    Fructose
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    Glucose
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उत्तर : 4. "Glucose"
व्याख्या :

Answer: D) Glucose Explanation: Glucose is the major monosaccharide found in the body. It is absorbed directly into the bloodstream duringdigestion and a vital carbohydrate as it is a source of energy.

प्र: Dry ice is nothing but 2731 0

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    Solid carbon dioxide
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    Baking soda
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    Gaseous carbon dioxide
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    Carbon monoxide
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उत्तर : 1. "Solid carbon dioxide"
व्याख्या :

Answer: A) Solid carbon dioxide Explanation:   Dry ice is solid form of carbon dioxide, used as a cooling agent.   It lower temperature than that of water ice and not leave any residue.

प्र: What rights does the Declaration of Independence express? 2730 0

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    The right to remain silent when interrogated by police
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    The right to citizenship
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    Legal rights of citizens
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    Human rights of citizens, including life and liberty
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उत्तर : 3. "Legal rights of citizens"
व्याख्या :

Answer: C) Legal rights of citizens Explanation: The Declaration of Independence express Legal rights of citizens.

प्र: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?  ___ utt ___ tt ___ ttu ___ 2729 0

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    t t u t
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    t u t t
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    t u u t
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    t t t u
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उत्तर : 3. "t u u t"
व्याख्या :

Answer: C) t u u t Explanation: t, u, u and t. The sequence is : tut tut tut tut.

प्र: The average of the ages of Sumit, Krishna and Rishabh is 43 years and the average of the ages of Sumit, Rishabh and Rohit is 49 years. If Rohit is 54 years old, what is Krishna'a age ? 2728 0

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    48 yrs
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    42 yrs
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    40 yrs
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    36 yrs
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उत्तर : 4. "36 yrs"
व्याख्या :

Answer: D) 36 yrs Explanation: Let present ages of Sumit=w, Krishna=x, Rishabh=y and Rohit=z , thenw+x+y = 43x3 = 129 ---(i) andw+y+z = 49x3 = 147 ---(ii)Subtracting (i) from (ii), (w+y+z) - (w+x+y)=147 -129 , z- x =18 ---(iii)Given Rohit's age => z = 54, so from (iii), x = 54-18 = 36

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