IIT JEE Practice Question and Answer

Q: What approximate value will come in place of question mark (?) in the following question ?  (49.001)2  = ? 1698 0

  • 1
    2500
    Correct
    Wrong
  • 2
    2400
    Correct
    Wrong
  • 3
    2600
    Correct
    Wrong
  • 4
    2300
    Correct
    Wrong
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Answer : 2. "2400"
Explanation :

Answer: B) 2400 Explanation: Given (49.001)2  = ? => =~ 49 x 49 =~ 2401 =~ 2400

Q: A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions ? 1698 1

  • 1
    14 cm
    Correct
    Wrong
  • 2
    13.5 cm
    Correct
    Wrong
  • 3
    12.5 cm
    Correct
    Wrong
  • 4
    11.4 cm
    Correct
    Wrong
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Answer : 3. "12.5 cm"
Explanation :

Answer: C) 12.5 cm Explanation: Let the required height of the building be x meter More shadow length, More height(direct proportion) Hence we can write as (shadow length) 40.25 : 28.75 :: 17.5 : x⇒ 40.25 × x = 28.75 × 17.5⇒ x = 28.75 × 17.5/40.25= 2875 × 175/40250= 2875 × 7/1610= 2875/230= 575/46= 12.5 cm

Q: The shorter i am, the bigger i am. What am I? 1698 0

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Answer :
Explanation :

A Temper.

Q: which is a best way to measure Ground Distance? 1698 0

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Answer :
Explanation :

Pace Count is a way to measure to Ground Distance. Pace Count is nothing but regular single natural step of about 30 inches long.

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Answer :
Explanation :

The letter 'E'. As of the above given data, It is in the 1st place in Earth, 2nd in Heaven and in the middle of the Sea. It appears once in a Year and twice in a Week. It is present in February, June, September, October, November & December. But not in the Month.   Hence, it is the letter 'E'.

Q: What is the relationship between Resistivity and Conductivity? 1697 0

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Answer :
Explanation :

Resistivity : Resistivity is a measure of the resistance to the flow of electrons.  Conductivity : Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.   Example: Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance.

Q: 92613 x 62742241 = ? + 89 Find the value of '?' 1697 0

  • 1
    166251
    Correct
    Wrong
  • 2
    166259
    Correct
    Wrong
  • 3
    166252
    Correct
    Wrong
  • 4
    166253
    Correct
    Wrong
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Answer : 3. "166252"
Explanation :

Answer: C) 166252 Explanation: Given 92613 x 62742241 = ? + 89   Using unit digit method,   On LHS,   1 x 1 x 1 = 1   sqrt of last digit 1 => it must end with either 9 or 1   so now   1 x 1 = 1   1 x 9 = 9   On RHS,   ? + 89   => ? = ...1 - 89 = last digit is 11- 9 = 2   or   => ? = ...9 - 89 = last digit is 9 - 9 = 0   Here in the options last digit 2 is option C.

Q: Synonym for the word : Bleak 1697 0

  • 1
    bare
    Correct
    Wrong
  • 2
    lush
    Correct
    Wrong
  • 3
    warm
    Correct
    Wrong
  • 4
    verdant
    Correct
    Wrong
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Answer : 1. "bare"
Explanation :

Answer: A) bare Explanation: Bleak means an area of land lacking vegetation and exposed to the elements like deserts.

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