IIT JEE Practice Question and Answer
8Q: Chola Empire was divided into ____ 1878 05b5cc6cee4d2b4197774e2b9
5b5cc6cee4d2b4197774e2b9- 1Mandalams, Nadu, Avanti & Kurramfalse
- 2Mandalams, Nadu, Malkhand & Kurramfalse
- 3Avanti, Nadu, Malkhand & Kurramfalse
- 4Mandalams, Nadu,Kurram & Valanadutrue
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Answer : 4. "Mandalams, Nadu,Kurram & Valanadu"
Explanation :
Answer: D) Mandalams, Nadu,Kurram & Valanadu Explanation:
Q: A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ? 1878 05b5cc6dee4d2b4197774ea5b
5b5cc6dee4d2b4197774ea5b- 110 secfalse
- 248 secfalse
- 336 sectrue
- 456 secfalse
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Answer : 3. "36 sec"
Explanation :
Answer: C) 36 sec Explanation: Given speed of jogger = 9 kmph Speed of train = 45 kmphAs they are in same direction, Relative speed = 45 - 9 = 36 kmph = 36x5/18 = 10 m/sDistance = 240 + 120 = 360 mts Time = distance/speed = 360/10 = 36 sec.
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? 1877 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: How many squares with sides 1/2 inch long are needed to cover a rectangle that is 4 ft long and 4 ft wide ? 1877 05b5cc74fe4d2b4197774fb49
5b5cc74fe4d2b4197774fb49- 19216true
- 210246false
- 312345false
- 47527false
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Answer : 1. "9216"
Explanation :
Answer: A) 9216 Explanation: It takes four of those little squares -- each one 1/2 inch on a side -- to cover one square inch. That's because each one is 1/2 x 1/2, or 1/4 of a square inch. In a rectangle that is 48 inches by 48 inches, there are 2304 square inches.(1 ft = 12 inches) Since it takes 4 little squares to cover 1 sq inch, then it would need 2304 x 4 squares (1/2 inch on a side each) to cover a rectangle 4 feet by 4 feet. That is 9,216 of those squares.
Q: A man covered a certain distance at some speed. Had he moved 3 kmph faster, he would have taken 40 minutes less. If he had moved 2 kmph slower, he would have taken 40 minutes more. The distance (in km) is 1877 05b5cc6d9e4d2b4197774e816
5b5cc6d9e4d2b4197774e816- 130false
- 236false
- 340true
- 442false
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Answer : 3. "40"
Explanation :
Answer: C) 40 Explanation: Let distance = x km and usual rate = y kmph.Then, x/y - x/(y+3) = 40/60 --> 2y (y+3) = 9x ----- (i)Also, x/(y-2) - x/y = 40/60 --> y(y-2) = 3x -------- (ii)On dividing (i) by (ii), we get: x = 40 km.
Q: Nine different letters of alphabet are given, words with 5 letters are formed from these given letters. Then, how many such words can be formed which have at least one letter repeated ? 1877 05b5cc6c6e4d2b4197774de0e
5b5cc6c6e4d2b4197774de0e- 143929true
- 259049false
- 315120false
- 40false
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Answer : 1. "43929"
Explanation :
Answer: A) 43929 Explanation: Number of words with 5 letters from given 9 alphabets formed = 95 Number of words with 5 letters from given 9 alphabets formed such that no letter is repeated is = 9P5 Number of words can be formed which have at least one letter repeated = 95 - 9P5 = 59049 - 15120 = 43929
Q: A Bus is running at 9/10 of its own speed reached a place in 22 hours. How much time could be saved if the bus would run at its own speed ? 1876 05b5cc6dde4d2b4197774ea00
5b5cc6dde4d2b4197774ea00- 11.5 hrsfalse
- 21.7 hrsfalse
- 32.2 hrstrue
- 43.5 hrsfalse
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Answer : 3. "2.2 hrs"
Explanation :
Answer: C) 2.2 hrs Explanation: Let the original Speed be "s" kmphAnd the usual time be "t" hrsGiven that if the bus is running at 9s/10 kmph the time is 22 hrs=> [9s/10] x 22 = t x s=> 99/5 = t => t = 19.8 hrs Hence, if bus runs at its own speed, the time saved = 22 - 19.8 = 2.2 hrs.
Q: Which organelle is the control center of a cell? 1876 05b5cc69fe4d2b4197774ca0f
5b5cc69fe4d2b4197774ca0f- 1Nucleustrue
- 2Cytoplasmfalse
- 3Cell membranefalse
- 4endoplasmic reticulumfalse
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Answer : 1. "Nucleus"
Explanation :
Answer: A) Nucleus Explanation: Nucleus serves as the control center for cell metabolism and reproduction.

