IIT JEE Practice Question and Answer
8Q: If the average height of boys in a hall is 180 cm and that of girls is 150 cm. If the average height of the gathering is 165 cm, then find the number of girls present in the hall if the number of boys present in the hall are 78 ? 1640 05b5cc6c7e4d2b4197774dea0
5b5cc6c7e4d2b4197774dea0- 156false
- 264false
- 387false
- 478true
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Answer : 4. "78"
Explanation :
Answer: D) 78 Explanation: Using Trial and error method, we get the number of girls in the hall = 78
Q: A passenger train is moving at a speed of 120 km/hr. If the length of the train is 101 meters, how long will it take to cross a railway platform 154 meters long ? 1640 05b5cc6d3e4d2b4197774e540
5b5cc6d3e4d2b4197774e540- 16.24 secfalse
- 26.58 secfalse
- 37.325 secfalse
- 47.65 sectrue
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Answer : 4. "7.65 sec"
Explanation :
Answer: D) 7.65 sec Explanation: Here total distance = 154 + 101 = 255 mtsGiven speed = 120 kmph = 120x5/18 m/secHence, Time = d/s = 255x18/120x5 = 7.65 sec
Q: Organisms need Nutrients in order to 1640 05b5cc6b6e4d2b4197774d583
5b5cc6b6e4d2b4197774d583- 1Breaking down foodtrue
- 2Utilize chemical compoundsfalse
- 3recyclingfalse
- 4Nonefalse
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Answer : 1. "Breaking down food"
Explanation :
Answer: A) Breaking down food Explanation: Nutrients are necessary for break down the food and supply energy to the organisms and to carry out essential life functions. Important nutrients are Hydrogen, Carbon and Oxygen. Some more important nutrients for plants are : Potassium, Sulphur, Nitrogen, Phosphorous, Calcium and Magnesium.
Q: Economic resources are also called 1639 05b5cc66de4d2b4197774bfb5
5b5cc66de4d2b4197774bfb5- Show AnswerHide Answer
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Answer :
Explanation :
Economic resources include land, labour, capital and entrepreneurship. Entrepreneurship is also considered an economic resource because individuals are responsible for creating businesses and moving economic resources in the business environment. These economic resources are also called as Factors of production.
Q: Antonym of the Word : efface 1639 05b5cc6d1e4d2b4197774e406
5b5cc6d1e4d2b4197774e406- 1burnfalse
- 2facefalse
- 3erasetrue
- 4createfalse
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Answer : 3. "erase"
Explanation :
Answer: C) erase Explanation:
Q: Which of the following has become the first country to grant citizenship to a Robot ? 1639 05b5cc6c0e4d2b4197774dac6
5b5cc6c0e4d2b4197774dac6- 1Saudi Arabiatrue
- 2New Zealandfalse
- 3Chinafalse
- 4Japanfalse
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Answer : 1. "Saudi Arabia"
Explanation :
Answer: A) Saudi Arabia Explanation:
Q: Penny has 5 children, 1st is January, 2nd kid February, 3rd is called march , 4th is April. What is the name of the 5th. 1638 05b5cc6a4e4d2b4197774cc7b
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Answer :
Explanation :
Here If you notice the difference, There is no question mark (?) at the end of the puzzle. In that case, "What" is the name of the 5th child.
Q: The closest algal relatives of land plants are 1638 05b5cc60de4d2b4197774b622
5b5cc60de4d2b4197774b622- 1charophytestrue
- 2chrysophytesfalse
- 3rhodophytesfalse
- 4bacillariophytesfalse
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Answer : 1. "charophytes"
Explanation :
Answer: A) charophytes Explanation: The charophytes are the extant group of green algae that are most closely related to modern land plants.