IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: The school principal has received complaints from parents about bullying in the school yard during recess. He wants to investigate and end this situation as soon as possible, so he has asked the recess aides to watch closely. Which situation should the recess aides report to the principal ? 44418 0

  • 1
    A boy is sitting glumly on a bench reading a book and not interacting with his peers.
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    गलत
  • 2
    Two boys are playing a one-on-one game of basketball and are arguing over the last basket scored.
    सही
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  • 3
    Three boys are huddled over a handheld video game, which isn’t supposed to be on school grounds.
    सही
    गलत
  • 4
    Four girls are surrounding another girl and seem to have possession of her backpack.
    सही
    गलत
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उत्तर : 4. "Four girls are surrounding another girl and seem to have possession of her backpack."
व्याख्या :

Answer: D) Four girls are surrounding another girl and seem to have possession of her backpack. Explanation: Seeing four girls surrounding another girl, while in possession of her backpack, is the most suspicious of the incidents described.

प्र: Choose the antonym of the word given from the following options ? MUNDANE 2430 0

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    Extraordinary
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  • 2
    Regular
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  • 3
    Visionary
    सही
    गलत
  • 4
    Routine
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    गलत
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उत्तर : 1. "Extraordinary"
व्याख्या :

Answer: A) Extraordinary Explanation:

प्र: 40% of 265 + 35% of 180 = 50% of ? 2106 0

  • 1
    383
    सही
    गलत
  • 2
    338
    सही
    गलत
  • 3
    84.5
    सही
    गलत
  • 4
    253.5
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उत्तर : 2. "338"
व्याख्या :

Answer: B) 338 Explanation: We know that 40% = 25   40% of 265 + 35% of 180 = 50% ?   25 x 265 + 35% of 180 = 50% ?   We know that (35% of 180 = 180% of 35) & 180% = 95   25 x 265 + 95 x 35 = 50% ?   106 + 63 = 50% ?   ?= 2 x 169 = 338.

प्र: A batsman scored 180 runs which included 11 boundaries and 8 sixes. What percent of his total score did he make by running between the wickets ? 1466 0

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    62.45%
    सही
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  • 2
    51.42%
    सही
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  • 3
    48.88%
    सही
    गलत
  • 4
    47.32%
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उत्तर : 3. "48.88%"
व्याख्या :

Answer: C) 48.88% Explanation: Number of runs made by running = 180 - (11 x 4 + 8 x 6)= 180 - (92)= 88Now, we need to calculate 88 is what percent of 180.⇒88180×100  = 48.888%.

प्र: If the given two numbers are respectively 7% and 28% of a third number, then what percentage is the first of the second ? 1817 0

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    24%
    सही
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  • 2
    29%
    सही
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  • 3
    34%
    सही
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  • 4
    25%
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उत्तर : 4. "25%"
व्याख्या :

Answer: D) 25% Explanation: Here, k = 7 and l = 28Therefore, first number = klx100 % of second number = 7/28 x 100% of second number = 25% of second number.

प्र: The price of pulses has increased by 25%. The percentage of reduction that a family should effect in the use of pulses so as not to increase the expenditure on this account is ? 1412 0

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    16%
    सही
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  • 2
    20%
    सही
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  • 3
    84%
    सही
    गलत
  • 4
    72%
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उत्तर : 2. "20%"
व्याख्या :

Answer: B) 20% Explanation: Reduction in consumption= P100+P X 100%= 25100+25 X 100%= 20%

प्र: Two numbers are respectively 40% and 30% more than a third number. The second number expressed in terms of percentage of the first is ? 1510 0

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    92.8%
    सही
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  • 2
    84.23%
    सही
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  • 3
    87.14%
    सही
    गलत
  • 4
    94.1%
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उत्तर : 1. "92.8%"
व्याख्या :

Answer: A) 92.8% Explanation: Here, x = 40 and y = 30;Therefore second number= [[100+y100+x] x 100 ]% of first number= [[100+y100+x] x 100 ]% of first numberSecond number = 92.8% of the first number.

प्र: A number is increased by 20% and then decreased by 20%, the final value of the number is ? 1583 0

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    increase by 2%
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  • 2
    decrease by 3%
    सही
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  • 3
    decrease by 4%
    सही
    गलत
  • 4
    increase by 5%
    सही
    गलत
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उत्तर : 3. "decrease by 4%"
व्याख्या :

Answer: C) decrease by 4% Explanation: Here, x = 20 and y = - 20Therefore, the net % change in value=x + y + xy100 %= 20 + -20 + 20 × -20100%  or  - 4% Since the sign is negative, there is a decrease in value by 4%.

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