IIT JEE Practice Question and Answer
8Q: If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x+y is equal to ? 1543 05b5cc761e4d2b4197774fd62
5b5cc761e4d2b4197774fd62- 15false
- 24false
- 33false
- 42true
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Answer : 4. "2"
Explanation :
Answer: D) 2 Explanation: Since 653xy is divisible by 5 as well as 2, so y = 0.Now, 653x0 must be divisible by 8.So, 3x0 must be divisible by 8. This happens when x = 2x + y = (2 + 0) = 2.
Q: What lives in the winter dies in the summer? 1540 05b5cc672e4d2b4197774c077
5b5cc672e4d2b4197774c077- 1Plantsfalse
- 2Animalsfalse
- 3Icycletrue
- 4None of the abovefalse
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Answer : 3. "Icycle"
Explanation :
Answer: C) Icycle Explanation: An icycle, a hanging spike of ice formed by the freezing of dripping water forms due to cool in winter and dies in summer due to hot.
Q: Hormones are chemicals secreted and regulated by the endocrine system. 1540 05b5cc678e4d2b4197774c15d
5b5cc678e4d2b4197774c15d- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: True. Hormones are chemicals secreted and regulated by the endocrine system.
Q: Who is the author of the book "The way of Knife: The CIA, A secret army and a war at the ends of the earth" ? 1540 05b5cc6c0e4d2b4197774daf3
5b5cc6c0e4d2b4197774daf3- 1Mark Twainfalse
- 2Irika Johnfalse
- 3Mario Pujofalse
- 4Mark Mazzettitrue
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Answer : 4. "Mark Mazzetti"
Explanation :
Answer: D) Mark Mazzetti Explanation:
Q: 60 percent of 2/7 of three-fourth of a number is 2664. What is the number ? 1539 05b5cc6c7e4d2b4197774deb9
5b5cc6c7e4d2b4197774deb9- 120720true
- 221352false
- 325421false
- 424150false
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Answer : 1. "20720"
Explanation :
Answer: A) 20720 Explanation: Let N be the required number. => 60100x27x34xN=2664 => N = 2664x2x7x5/9 => N = 20720.
Q: What looks back but cannot see? 1538 05b5cc636e4d2b4197774ba14
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Answer :
Explanation :
Reflection is what which looks back but can't see.
Q: Which of the following software firm will acquire Brilliant Basics, Product Design and Customer Experience (CX) company ? 1538 05b5cc6cde4d2b4197774e18b
5b5cc6cde4d2b4197774e18b- 1Infosystrue
- 2Nautics Technologyfalse
- 3Googlefalse
- 4Source code software co.false
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Answer : 1. "Infosys"
Explanation :
Answer: A) Infosys Explanation:
Q: A duster is of dimension 5x5x7 all in cms, is sinked into a cylindrical vessel of radius 5 cm and height 10 cm. After insertion the level of the water is inccresed by 2.14 cm. Then by what percentage the part of the duster is above the layer ? 1538 05b5cc705e4d2b4197774f216
5b5cc705e4d2b4197774f216- 196 %false
- 24 %true
- 397 %false
- 43 %false
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Answer : 2. "4 %"
Explanation :
Answer: B) 4 % Explanation: Imension of the duster is assumed as 5x5x7 cm3 Volume of the duster below the water layer= volume of water increased= πxrxrxh = 3.14×52×2.14 ≈ 168 cm3 Total volume of the duster = 5×5×7 = 175 cm3 Percentage of the duster part below the layer = 168×100/175 = 96% Percentage of the duster part above the layer = 4%