IIT JEE Practice Question and Answer
8Q: Ali and Faizer are 27m apart. They both start walking and meet 9 hrs later, if they travel in the same direction and meet after 3 hrs if they walk in opposite dirction, Ali’s speed must most likely be ? 1748 05b5cc715e4d2b4197774f44f
5b5cc715e4d2b4197774f44f- 19 m/hfalse
- 23 m/hfalse
- 36 m/htrue
- 412 m/hfalse
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Answer : 3. "6 m/h"
Explanation :
Answer: C) 6 m/h Explanation: let, speed of Ali=X mph and Faizer=Y mph Now, relative speed when Ali is walking int the same direction with Faizer= (X-Y)mphhence, according to question, 27/(X-Y)=9 ; solving X-Y=3; --- (1) Now relative speed when walking in the opposite direction= (X+Y) mphhence, according to question, 27/(X+y)=3; solving X+Y=9; --- (2) solving 1 and 2 we get X=6 and Y=3, where X is the speed of Ali.
Q: At what temperature do the Fahrenheit and celcius scales give the same reading? 1748 05b5cc7b6e4d2b4197775090a
5b5cc7b6e4d2b4197775090a- 1212 degreesfalse
- 232 degreeesfalse
- 3-40 degreeestrue
- 40 degreeesfalse
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Answer : 3. "-40 degreees"
Explanation :
Answer: C) -40 degreees Explanation: We want the temperature when F=C. We know that, F = C x 95 + 32 So substituting C For F, we have C = -40o Therefore, C = -40. Thus when C = -40, we have C = F
Q: The ratio of present ages of X and Y is 4:5. Which of the following can't be the ratio of ages of X and Y, 20 years ago ? 1747 05b5cc73de4d2b4197774f925
5b5cc73de4d2b4197774f925- 12 : 5false
- 28 : 15false
- 39 : 10true
- 43 : 5false
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Answer : 3. "9 : 10"
Explanation :
Answer: C) 9 : 10 Explanation: The ratio of X and Y ages at present is 4:5. Then, the ratio 20 years ago will not be more than the ratio at present. So, from the options 9:10 is not satifying => its ratio is 0.9 which is greater than presnt ratio of 0.8.
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Answer :
Explanation :
12 N in a C means 12 Numbers in a Clock.
Q: A girl want to read a complete book. She read 2/5 part of a book on 1st day, 34% on second day and remaining pages in next two days. On those two days she read equal number of pages. If she read 52 pages on last day, then find out total number of pages that the book contain ? 1747 05b5cc6cbe4d2b4197774e108
5b5cc6cbe4d2b4197774e108- 1400true
- 2525false
- 3325false
- 4475false
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Answer : 1. "400"
Explanation :
Answer: A) 400 Explanation: Let the total number of pages in the book be 'x'. From given data, 2x/5 + 34x/100 + 52 + 52 = x => 40x + 34x + 10400 = 100x => 26x = 10400 => x = 400. Hence, total pages in the book are 400.
Q: Read each part of the sentence to find out if there is any error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. As much as i admire him for his talent(1) / and endeavor to achieve success(2)/ I cannot forgive him for being so(3)/rude to the not so well to do ones(4) 1746 05b5cc6cae4d2b4197774e0a4
5b5cc6cae4d2b4197774e0a4- 1(1)true
- 2(2)false
- 3(3)false
- 4(4)false
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Answer : 1. "(1)"
Explanation :
Answer: A) (1) Explanation: The error lies in part (1). As the phrase 'as much as' needs to be replaced with 'much as I'. This is because we use 'as much as' for comparing two qualities or things. But here in the given sentence a contrast is given in the latter part of the sentence. So we need a conjunction like 'even though' 'although' etc... 'Much as I' also serves the same purpose.
Q: A jogger running at 9 km/hr along side a railway track is 260 m ahead of the engine of a 140 m long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger ? 1746 05b5cc6e5e4d2b4197774ed29
5b5cc6e5e4d2b4197774ed29- 125 secfalse
- 240 sectrue
- 338 secfalse
- 432 secfalse
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Answer : 2. "40 sec"
Explanation :
Answer: B) 40 sec Explanation: Speed of train relative to jogger = 45 - 9 = 36 km/hr.= 36 x 5/18 = 10 m/sec. Distance to be covered = 260 + 140 = 400 m. Time taken = 400/10 = 40 sec.
Q: Which is the Largest Organ in the Human Body? 1746 05b5cc6b5e4d2b4197774d563
5b5cc6b5e4d2b4197774d563- 1Heartfalse
- 2Brainfalse
- 3Skintrue
- 4Liverfalse
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Answer : 3. "Skin"
Explanation :
Answer: C) Skin Explanation: There are about 70 organs in the human body. The Top 10 largest organs in the human body based on size are: 1. Skin 2. Liver 3. Brain 4. Lungs 5. Heart 6. Kidneys 7. The Spleen 8. The Pancreas 9. Thyroxin 10. The Prostrate.