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प्र: Lichens are the best indicator of 5373 1

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    Air pollution
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    Sound pollution
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    Noise pollution
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    Water pollution
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उत्तर : 1. "Air pollution"
व्याख्या :

Answer: A) Air pollution Explanation: 1. Lichens are plants that grow in exposed places such as rocks or tree bark.   2.  Lichens are widely used as environmental indicators or bio-indicators. They can be used as air pollution indicators, especially of the concentration of sulfur-di-oxide in the atmosphere.     3. They need to be very good at absorbing water and nutrients to grow there.

प्र: Which of these relationships is true of an uncharged atom? 5362 0

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    The atomic mass is equal to the atomic number.
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    The number of electrons is equal to the number of neutrons.
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    The number of protons is equal to the number of electrons.
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    The atomic mass is equal to the number of electrons.
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उत्तर : 3. "The number of protons is equal to the number of electrons."
व्याख्या :

Answer: C) The number of protons is equal to the number of electrons. Explanation: The number of protons is equal to the number of electrons. That is the number of positive charges is equal to the number of negative charges.

प्र: Pen is to poet as needle is to 5329 0

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    Sewing
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    Thread
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    Tailor
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    Button
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उत्तर : 3. "Tailor"
व्याख्या :

Answer: C) Tailor Explanation: Here Pen is a tool which is used to write and poet uses it. Then, the needle is a tool which is used to stitch and it is used by Tailor. Except tailor, none of the other options is a person to use it.   Hence, Pen : Poet :: Needle : Tailor

प्र: 7 9 19 18 31 29 Find the odd number in the given Number Series? 5318 0

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    31
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    29
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    18
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    19
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उत्तर : 2. "29"
व्याख्या :

Answer: B) 29 Explanation: Here the given number series follows a pattern of two alternate series. 1. 7 19 31 ...(Difference of 12) 2. 9 18 27 ...(Difference of 9) Here the odd number is 29 instead of 27 And the next number is 31 + 12 = 43 & 27 + 9 = 36

प्र: Two persons start running simultaneously around a circular track of length 300 m from the same point at speeds of 15 km/hr and 25 km/hr. When will they meet for the first time any where on the track if they are moving in opposite directions  ? 5280 0

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    27 sec
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    31 sec
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    23 sec
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    29 sec
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उत्तर : 1. "27 sec"
व्याख्या :

Answer: A) 27 sec Explanation: Time taken to meet for the first time anywhere on the track = length of the track / relative speed = 300 / (15 + 25)5/18 = 300x 18 / 40 x 5 = 27 seconds.

प्र: The average weight of 45 passengers in a bus is 52 kg. 5 of them whose average weight is 48 kg leave the bus and other 5 passengers whose average weight is 54 kg join the bus at the same stop. What is the new average weight of the bus? 5267 0

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    54.21 kgs
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    51.07 kgs
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    52.66 kgs
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    53.45 kgs
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उत्तर : 3. "52.66 kgs"
व्याख्या :

Answer: C) 52.66 kgs Explanation: Given total number of passengers in the bus = 45 First average weight of 45 passengers = 52 kgs Average weight of 5 passengers who leave bus = 48 Average weight of 5 passengers who joined the bus = 54 Therefore, the net average weight of the bus is given by = 45 x 52 - 5 x 48 + 5 x 5445 = 237045= 1583= 52.66 kgs.

प्र: A girl facing north rotates 100(degree) clockwise then 190(degree) anticlockwise. what is new direction of the girl ? 5262 0

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    North-East
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    West
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    South-East
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    South
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उत्तर : 2. "West"
व्याख्या :

Answer: B) West Explanation: First girl facing NorthThen she rotates 100 deg clock wise => 10 deg ESThen again she rotates 190 deg anti clock wise => for 100 deg it is North and more 90 deg means West.Therefore, the new direction of the girl is West.

प्र: One-quarter of one-seventh of a land is sold for Rs. 30,000. What is the value of an four fifteenth of land ? 5250 0

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    Rs.1,92,000
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    Rs.2,24,000
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    Rs.1,26,000
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    Rs.3,42,000
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उत्तर : 2. "Rs.2,24,000"
व्याख्या :

Answer: B) Rs.2,24,000 Explanation: One-quarter of one-seventh = 1/4 x 1/7= 1/28Now, 1/28 of a land costs = Rs. 30,000Thus, 8/35 of the land will cost = 30,000 x 28 x 4/15= Rs. 2,24,000.

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