IIT JEE Practice Question and Answer
8Q: An amount doubles itself in 15 years. what is the rate of interest ? 1674 05b5cc711e4d2b4197774f3cd
5b5cc711e4d2b4197774f3cd- 17.85 %false
- 29.41%false
- 36.66 %true
- 44.21 %false
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Answer : 3. "6.66 %"
Explanation :
Answer: C) 6.66 % Explanation: Let the principle be Rs. PAs the amount double itself the interest is Rs. P tooSo P = P x r x 15/100=> r = 100/15 = 20/3 % = 6.66 %.
Q: Khushi bought the bangles of equal number of Rs. 34 per piece, Rs. 42 per piece and Rs. 6 per piece. She spends total Rs. 1722 on all types of bangles. How many bangles did she buy of each type ? 1674 05b5cc6c2e4d2b4197774dbd2
5b5cc6c2e4d2b4197774dbd2- 127false
- 213false
- 317false
- 421true
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Answer : 4. "21"
Explanation :
Answer: D) 21 Explanation: Let number of bangles kushi purchase of each type = x From the given data, 34x + 42x + 6x = 1722 x = 1722/82 = 21.
Q: Fog is an example of a 1674 05b5cc6b8e4d2b4197774d684
5b5cc6b8e4d2b4197774d684- 1liquid dispersed in gastrue
- 2solid dispersed in liquidfalse
- 3liquid dispersed in solidfalse
- 4gas dispersed in liquidfalse
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Answer : 1. "liquid dispersed in gas"
Explanation :
Answer: A) liquid dispersed in gas Explanation: Fog is an example of a colloidal system liquid dispersed in gas.
Q: The more you take, the more you leave behind. What is that? 1673 05b5cc63de4d2b4197774bae3
5b5cc63de4d2b4197774bae3- 1Picturesfalse
- 2Holefalse
- 3Clothesfalse
- 4Footstepstrue
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Answer : 4. "Footsteps"
Explanation :
Answer: D) Footsteps Explanation: Yes, footsteps are what we take more, the more we leave behind.
Q: Raghu earns 25% on an investment but loses 10% on another investment. If the ratio of the two investment is 3:5. What is the gain or loss on two investments taken together ? 1673 05b5cc754e4d2b4197774fb72
5b5cc754e4d2b4197774fb72- 11.251 %false
- 23.125 %true
- 37.21 %false
- 49.451 %false
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Answer : 2. "3.125 %"
Explanation :
Answer: B) 3.125 % Explanation: Taking the 2 investments to be 3x and 5x respectivelyTotal income of Raghu = (3x) x 1.25 + (5x) x 0.9 = 8.25Therefore, Gain% = 0.25/8 x 100 = 3.125 %.
Q: Synapsis occurs during 1672 05b5cc6abe4d2b4197774d062
5b5cc6abe4d2b4197774d062- 1Mitosisfalse
- 2Meiosistrue
- 3Both A & Bfalse
- 4Nonefalse
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Answer : 2. "Meiosis"
Explanation :
Answer: B) Meiosis Explanation: Synapsis is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. Synapsis takes place during prophase I of meiosis. It is also called as Syndesis.
Q: Which of the following can be a symptom of AIDS? 1672 05b5cc688e4d2b4197774c309
5b5cc688e4d2b4197774c309- 1Hair lossfalse
- 2Severe weight gainfalse
- 3Tirednesstrue
- 4All the abovefalse
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Answer : 3. "Tiredness"
Explanation :
Answer: C) Tiredness Explanation: From the aboe given options, only extreme and unexplained tiredness is the symptom of AIDS. The other symptoms of AIDS include: recurring fever, thrush — a thick, whitish coating of the tongue or mouth that's caused by a yeast infection and sometimes accompanied by a sore throat, diarrhea that lasts more than a week, headaches, lightheadedness, and/or dizziness.
Q: If A1, A2, A3, A4, ..... A10 are speakers for a meeting and A1 always speaks after, A2 then the number of ways they can speak in the meeting is 1672 05b5cc7b4e4d2b419777508a6
5b5cc7b4e4d2b419777508a6- 19!false
- 29!/2false
- 310!false
- 410!/2true
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Answer : 4. "10!/2"
Explanation :
Answer: D) 10!/2 Explanation: As A1 speaks always after A2, they can speak only in 1st to 9th places and A2 can speak in 2nd to 10 the places only when A1 speaks in 1st place A2 can speak in 9 places the remaining A3, A4, A5,...A10 has no restriction. So, they can speak in 9.8! ways. i.e when A2 speaks in the first place, the number of ways they can speak is 9.8!. When A2 speaks in second place, the number of ways they can speak is 8.8!. When A2 speaks in third place, the number of ways they can speak is 7.8!. When A2 speaks in the ninth place, the number of ways they can speak is 1.8! Therefore,Total Number of ways they can speak = (9+8+7+6+5+4+3+2+1) 8! = 92(9+1)8! = 10!/2