IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Guess the Missing number in the Number Challenge ? 1614 05b5cc6d1e4d2b4197774e3ed
5b5cc6d1e4d2b4197774e3ed- 18false
- 232false
- 344false
- 464true
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उत्तर : 4. "64"
व्याख्या :
Answer: D) 64 Explanation: The logic in the challenge is 81x6 = 9x6 = 54 144x7=84 Similarly, 64x8 = 8x8 = 64.
प्र: When 5% is lost in grinding Maize, a country has to import 20 million bags; but when only 2% is lost, it has to import only 15 million bags. Find the quantity of Maize, which grows in the country ? 1614 05b5cc6dae4d2b4197774e88f
5b5cc6dae4d2b4197774e88f- 1188 millionfalse
- 2166 2/3 milliontrue
- 3192 3/4 millionfalse
- 4Nonefalse
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उत्तर : 2. "166 2/3 million"
व्याख्या :
Answer: B) 166 2/3 million Explanation: 5% - 2% = 3%=> 3% ------ 5 million bags 100% ---- ? => 166 2/3 million bags.
प्र: Question : What is the sum which earned interest ? Statements : a. The total simple interest was Rs. 9000 after 9 years.b. The total of sum and simple interest was double of the sum after 6 years. 1614 05b5cc767e4d2b4197774fe10
5b5cc767e4d2b4197774fe10- 1Only a is sufficientfalse
- 2Neither a nor b is sufficientfalse
- 3Only b is sufficientfalse
- 4Both a and b sufficienttrue
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उत्तर : 4. "Both a and b sufficient"
व्याख्या :
Answer: D) Both a and b sufficient Explanation: Let the sum be Rs. x a. gives, S.I = Rs. 9000 and time = 9 years. b. gives, Sum + S.I for 6 years = 2 x Sum --> Sum = S.I for 6 years. Now, S.I for 9 years = Rs. 9000 S.I for 1 year = Rs. 9000/9 = Rs. 1000. S.I for 6 years = Rs. (1000 x 6)= Rs. 6000. --> x = Rs. 6000 Thus, both a and b are necessary to answer the question.
प्र: Where does translation take place in the cell? 1614 05b5cc655e4d2b4197774bd7a
5b5cc655e4d2b4197774bd7a- 1Nucleusfalse
- 2Mitochondriafalse
- 3Ribosomesfalse
- 4Cytoplasmtrue
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उत्तर : 4. "Cytoplasm"
व्याख्या :
Answer: D) Cytoplasm Explanation: Translation occurs in the cytoplasm whereas transcription occurs in the nucleus. Transcription and Translation: Terms transcription and translation in biology are generally related to the DNA and its properties. Human cells replicate. In order to do that, they have to produce the same constituents for the new cell that is to be made. The only way to do that is by producing proteins. The proteins are produced in the process that is called protein synthesis. The first step is in the nucleus where a particular gene is being expressed so it enables all protein factors to come and to replicate that part of a chromosome. This is finished when mRNA, the same single-stranded genetic code of a particular gene, is formed. This is transcription. Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation.
प्र: Guess the Missing Letter in the Letter Puzzle ? 1613 05b5cc6d0e4d2b4197774e353
5b5cc6d0e4d2b4197774e353- 1Ltrue
- 2Mfalse
- 3Nfalse
- 4Ofalse
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उत्तर : 1. "L"
व्याख्या :
Answer: A) L Explanation: The Logic followed in the given puzzle is : L x P = 12 x 16 = 192 (Alphabetical numbers of L & P) P x T = 16 x 20 = 320 (Alphabetical numbers of P & T) Similarly, K x () = 132 => () = 132/11 = 12 => L Hence, the missing letter is L
प्र: Two trains cross each other in _____ time ? 1613 05b5cc6d1e4d2b4197774e3a6
5b5cc6d1e4d2b4197774e3a6- 1145 secfalse
- 2124 secfalse
- 3158 secfalse
- 4162 sectrue
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उत्तर : 4. "162 sec"
व्याख्या :
Answer: D) 162 sec Explanation: Given two trains of length = 180 mts + 180 mts The distance is = Length of trains = 360 mts Speed = 58 - 50 = 8 kmph x 5/18 m/s Then, Time = dis/speed = (360x18) / (8x5) = 162 sec.
प्र: What is the value of a two–digit number? A. The sum of the digits is 15. B. The difference of the squares of the digits is 45. C. The difference of their digits is 3. 1613 05b5cc6a6e4d2b4197774cdde
5b5cc6a6e4d2b4197774cdde- 1B and C together are sufficientfalse
- 2Any one pair of A and B, B and C or C and A is sufficienttrue
- 3C and A together are sufficientfalse
- 4A and B together are sufficientfalse
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उत्तर : 2. "Any one pair of A and B, B and C or C and A is sufficient"
व्याख्या :
Answer: B) Any one pair of A and B, B and C or C and A is sufficient Explanation: From the given data, Let the two gits of a number be x & y A) x + y = 15 B) x2 - y2 = 45 (x+y) (x - y) = 45 C) x - y = 3 From any 2 of the given 3 statements, we can find that 2 digit number as 2x = 18 => x = 9 => y = 6 Hence, 2 digit number is 96. Any one pair of A and B, B and C or C and A is sufficient to find.
प्र: What causes brownian motion in colloids? 1612 05b5cc662e4d2b4197774bebb
5b5cc662e4d2b4197774bebb- 1coagulation of particles and the dispersed phasefalse
- 2erratic flashes of lightfalse
- 3molecules of the dispersion medium colliding with dispersed phase particlestrue
- 4All the abovefalse
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उत्तर : 3. "molecules of the dispersion medium colliding with dispersed phase particles"
व्याख्या :
Answer: C) molecules of the dispersion medium colliding with dispersed phase particles Explanation: When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement. Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal. This leads to the zig-zag (random) motion of the colloidal particles.

