IIT JEE Practice Question and Answer
8Q: What approximate value will come in place of question mark (?) in the following question ? (49.001)2 = ? 1698 05b5cc6c7e4d2b4197774dec3
5b5cc6c7e4d2b4197774dec3- 12500false
- 22400true
- 32600false
- 42300false
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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 15b5cc6f4e4d2b4197774f013
5b5cc6f4e4d2b4197774f013- 114 cmfalse
- 213.5 cmfalse
- 312.5 cmtrue
- 411.4 cmfalse
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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 05b5cc68be4d2b4197774c379
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Answer :
Explanation :
A Temper.
Q: which is a best way to measure Ground Distance? 1698 05b5cc6b2e4d2b4197774d373
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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.
Q: I am the first on Earth, the second in Heaven. I appear two times in a week you can only see me once in a year. Although I am in the middle of the sea, l am not found in month, but l am in February, June, September, October, November & December. Who am I? 1697 05b5cc6a6e4d2b4197774cd27
5b5cc6a6e4d2b4197774cd27- Show AnswerHide Answer
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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 05b5cc697e4d2b4197774c5d4
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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 05b5cc6bae4d2b4197774d7fd
5b5cc6bae4d2b4197774d7fd- 1166251false
- 2166259false
- 3166252true
- 4166253false
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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 05b5cc6c1e4d2b4197774db9b
5b5cc6c1e4d2b4197774db9b- 1baretrue
- 2lushfalse
- 3warmfalse
- 4verdantfalse
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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.

