IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: The present average age of a family of five members is 26 years. If the present age of the youngest member in the family is ten years, then what was the average age of the family at the time of the birth of the youngest member ? (Assume no death occurred in the family since the birth of the youngest) 4328 0

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    19 years
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  • 2
    16 years
    सही
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  • 3
    18 years
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  • 4
    20 years
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उत्तर : 4. "20 years"
व्याख्या :

Answer: D) 20 years Explanation: Present total age of the members = 26(5) = 130 years.   Present age of the youngest member = 10 years   Present total age of the remaining four members = 130 -10 = 120 years   Their average age at the time of the birth of the youngest member = 120-4×104 = 30 - 10 = 20 years.

प्र: In a mens hostel, there were 95 students. To accommodate 30 more students the average is decreased by rupees 5. But total expenditure increased by Rs.500. Find the total expenditure of the hostel now ? 4298 0

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    Rs. 4680
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  • 2
    Rs. 4420
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  • 3
    Rs. 4960
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    गलत
  • 4
    Rs. 5480
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उत्तर : 1. "Rs. 4680"
व्याख्या :

Answer: A) Rs. 4680 Explanation: Let the expenditure on the 95 students be 'x' Then, 95x + 500 = 120(x – 5)95x + 500 = 120x - 600120x - 95x = 110025x = 1100=> x = 44 Therefore, total expenditure of the hostel becomes95 x 44 + 500 = 4680.

प्र: माइक्रोप्रोसेसर उद्योग में कौन सी कंपनी सबसे बड़ी खिलाड़ी है? 4297 4

  • 1
    AMD
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  • 2
    IBM
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  • 3
    Motorola
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  • 4
    Intel
    सही
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उत्तर : 4. "Intel"
व्याख्या :

Answer: D) Intel Explanation:

प्र: In a certain code language, 'how can you go' is written as 'ja da ka pa', 'can you come here' is written as 'na ka sa ja' and 'cone and go' is written as 'ra pa sa'. How is 'here' written in that code ? 4288 0

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    na
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  • 2
    ja
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  • 3
    sa
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  • 4
    None
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उत्तर : 1. "na"
व्याख्या :

Answer: A) na Explanation: From the given information : how can you go = ja da ka pa....(1)can you come here = na ka sa ja...(2)come and go = ra pa sa....(3)from (1)&(2), can you = ja ka...(4)from (2)&(3), come = sa...(5)Using (4)&(5) in (2), we get here = na.

प्र: Smallest gulf in the world is 4285 0

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    Gulf of Mexico
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  • 2
    Persian Gulf
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  • 3
    Gulf of Oman
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  • 4
    Gulf of California
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उत्तर : 4. "Gulf of California"
व्याख्या :

Answer: D) Gulf of California Explanation: A gulf in geography is a large bay that is an arm of an ocean or sea.   The second smallest sea on Earth is the Sea of Cortez, more commonly called the Gulf of California. This sea is about 62,000 square miles. It lies between Mexico and the Baja California Peninsula.

प्र: By selling an article at Rs.800, a shopkeeper makes a profit of 25%.At what price should he sell the article so as to make a loss of 25%? 4273 0

  • 1
    Rs.720
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  • 2
    Rs.640
    सही
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  • 3
    Rs.540
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  • 4
    Rs.480
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उत्तर : 4. "Rs.480"
व्याख्या :

Answer: D) Rs.480 Explanation: SP = Rs.800 ; Profit = 25%  CP = SP x 100100+P% = 800 x 100100+25 = 640    Now, CP = Rs.640   Loss = 25% = 25% of Rs.640 = Rs.160   Thus, SP = CP - Loss = Rs.640 - Rs.160 = Rs.480

प्र: Which of the Phrases(1), (2), (3) and (4) given below each sentence should replace the phrases printed in bold in the sentence to make it grammatically correct. The ban is applied by the district’s commercial taxes department after protests by a community, which had threat to burn theatres screening the controversial movie. 4271 0

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    had threated to burn
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  • 2
    had threatened to burn
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  • 3
    had threatened to burning
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  • 4
    had threats of burning
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उत्तर : 2. "had threatened to burn"
व्याख्या :

Answer: B) had threatened to burn Explanation:

प्र: What was the day on 2nd Jan 1901 ? 4254 0

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    Tuesday
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  • 2
    Wednesday
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  • 3
    Monday
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  • 4
    Thursday
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उत्तर : 2. "Wednesday"
व्याख्या :

Answer: B) Wednesday Explanation: 2nd Jan 1901 means(1900 years and 2 day)Now, 1600 years have 0 odd day300 years have 1 odd day2 days has 2 odd dayTotal no. of odd days = 0 + 1 + 2 = 3 daysHence, the day on 2nd Jan 1901 was Wednesday.

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