IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: A woman fills a bucket in 6 minutes. 1845 buckets have to be filled from 8 am. to 9:30 am. How many woman employees should be employed for this task? 1618 0

  • 1
    111
    सही
    गलत
  • 2
    117
    सही
    गलत
  • 3
    123
    सही
    गलत
  • 4
    139
    सही
    गलत
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उत्तर : 3. "123"
व्याख्या :

Answer: C) 123 Explanation: We know that, M1 × D1W1 = M2 × D2W2 Here M1 = 1, D1 = 6 min, W1 = 1 and M2 = M, D2 = 90 min, W2 = 1845   1 × 61 = M × 901845  => M = 123

प्र: What time will it be in 45 minutes? Now, if the time is 4:48 pm. 1617 0

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उत्तर :
व्याख्या :

As now, the time 4 : 48 pm after 45 min it will be 4:48 + 45 min = (4 hrs : 48 + 12 min) pm + 33 min = 5 hrs : 33 min pm. Hence, it is 5:33 pm.

प्र: An owner of a Dry fruits shop sold small packets of mixed nuts for Rs. 150 each and large packets for Rs. 250 each. One day he sold 5000 packets, for a total of Rs. 10.50 lakh. How many small packets were sold ? 1617 0

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    2000
    सही
    गलत
  • 2
    3000
    सही
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  • 3
    2500
    सही
    गलत
  • 4
    3500
    सही
    गलत
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उत्तर : 1. "2000"
व्याख्या :

Answer: A) 2000 Explanation: Let 's' be the number of small packets and 'b' the number of large packets sold on that day.   Therefore, s + b = 5000 ... eqn (1)   Each small packet was sold for Rs.150.Therefore, 's' small packets would have fetched Rs.150s.   Each large packets was sold for Rs.250.Therefore, 'b' large packets would have fetched Rs.250b.   Total value of sale = 150s + 250b = Rs. 10.5 Lakhs (Given)   Or 150s + 250b = 10,50,000 ... eqn (2)   Multiplying equation (1) by 150, we get 150s + 150b = 7,50,000 ... eqn (3)   Subtracting eqn (3) from eqn (2), we get 100b = 3,00,000Or b = 3000   We know that s + b = 5000So, s = 5000 - b = 5000 - 3000 = 2000.   2000 small packets were sold.

प्र: It was Tuesday on Jan 1, 2006. What was the day of the week Jan 1, 2010 ? 1617 0

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    Sunday
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  • 2
    Friday
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  • 3
    Monday
    सही
    गलत
  • 4
    Tuesday
    सही
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उत्तर : 2. "Friday"
व्याख्या :

Answer: B) Friday Explanation: On 31st December, 2005 it was Monday. Number of odd days from the year 2006 to the year 2009 = (1 + 1 + 2 + 1) = 5 days. On 31st December 2009, it was Thursday. Thus, on 1st Jan, 2010 it is Friday.

प्र: Avinash gave a sum of 5400 at the simple rate of interest of 8% to Rajeev for 4 years and Rajeev gave this amount to Chanukya at the rate of 6% for 4 years. Find how much extra amount has to be paid by Rajeev to Avinash after 4 years? 1617 0

  • 1
    Rs. 364
    सही
    गलत
  • 2
    Rs. 432
    सही
    गलत
  • 3
    Rs. 498
    सही
    गलत
  • 4
    Rs. 554
    सही
    गलत
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उत्तर : 2. "Rs. 432"
व्याख्या :

Answer: B) Rs. 432 Explanation: Here Avinash gave to Rajeev and Rajeev gave the same to Chanukya Principal amount and Time is same but the only difference is Rate of interest. Rajeev took @ 8% and gave it to Chanukya @ 6% Here the difference in interest rate = 2% 2% of 5400 should be the extra amount paid by Rajeev to Avinash Required amount = 2 x 5400 x 4100 = 432   Hence, Rs. 432 is the extra amount has to be paid by Rajeev to Avinash after 4 years.

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उत्तर : 4. "4"
व्याख्या :

Answer: D) 4 Explanation: Suman is brilliant and dishonest is   P ∧~ RSuman is brilliant and dishonest iff suman is rich isQ ↔  (P ∧ ~ R)   Negative of statement is expressed as~ (Q ↔(P ∧ ~ R)).

प्र: 'Brothers and sisters, I have none. But that man's father is my father's son'.How I and that man are related respectively? 1615 0

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    Father & Son
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  • 2
    Brothers
    सही
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  • 3
    Son & Father
    सही
    गलत
  • 4
    Nephews
    सही
    गलत
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उत्तर : 1. "Father & Son"
व्याख्या :

Answer: A) Father & Son Explanation: Given that man's father is my father's son => Me because i have no brothers => Mans father is me. Hence, that man is my Son.

प्र: The basic unit of the nervous system is the 1615 0

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    Lymphs
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    Nephrons
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    Nerves
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  • 4
    Neurons
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उत्तर : 4. "Neurons"
व्याख्या :

Answer: D) Neurons Explanation: The basic unit of the nervous system is the Neurons.   The neuron is a single nerve cell, and you have billions of them. There are three basic types of neurons:: 1. Association, 2. Afferent  and 3. Efferent. The association neurons comprise the central nervous system (CNS) that is the brain and spinal cord. The afferent neurons are also known as the sensory neurons, they bring the stimuli from the sensors (e.g., skin, eyes, ears) to the CNS. The efferent neurons are also known as motor neurons, they bring the responses from the brain to the muscles and the glands.

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