IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: The number of ways in which 8 distinct toys can be distributed among 5 children? 4119 05b5cc699e4d2b4197774c700
5b5cc699e4d2b4197774c700- 15P8false
- 25^8true
- 38P5false
- 48^5false
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उत्तर : 2. "5^8"
व्याख्या :
Answer: B) 5^8 Explanation: As the toys are distinct and not identical, For each of the 8 toys, we have three choices as to which child will receive the toy. Therefore, there are 58 ways to distribute the toys. Hence, it is 58 and not 85.
प्र: An exhibition was conducted for 4 weeks. The number of tickets sold in 2nd workweek was increased by 20% and increased by 16% in the 3rd workweek but decreased by 20% in the 4th workweek. Find the number of tickets sold in the beginning, if 1392 tickets were sold in the last week ? 4113 05b5cc74fe4d2b4197774faea
5b5cc74fe4d2b4197774faea- 11124false
- 21420false
- 31345false
- 41250true
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उत्तर : 4. "1250"
व्याख्या :
Answer: D) 1250 Explanation: Let initially 'X' ticket has been sold.So now in 2nd week 20% increases, so=> X x 120/100In 3rd week 16% increases, so=> X x (120/100) x (116/100)In 4th week 20% decrease, so=> X x (120/100) x (116/100) x (80/100) = 1392X = 1250.
प्र: Artist is to painting as senator is to 4108 05b5cc636e4d2b4197774b9fa
5b5cc636e4d2b4197774b9fa- 1politicianfalse
- 2constituentsfalse
- 3attorneyfalse
- 4lawtrue
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उत्तर : 4. "law"
व्याख्या :
Answer: D) law Explanation: As we know that an artist makes paintings, similarly, a senator makes laws. Hence, Artist : Painting :: Senator : Law.
प्र: Symbolic logic was discovered by ___________ 4108 15b5cc6bfe4d2b4197774da9c
5b5cc6bfe4d2b4197774da9c- 1Herman Hollerithfalse
- 2Vonn Neumannfalse
- 3George Booletrue
- 4Sun Microsystemfalse
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उत्तर : 3. "George Boole"
व्याख्या :
Answer: C) George Boole Explanation:
प्र: 194, 194, 191, 183, 168, ? Find the next number in the above series? 4099 05b5cc6bce4d2b4197774d872
5b5cc6bce4d2b4197774d872- 1154false
- 2156false
- 3144true
- 4143false
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उत्तर : 3. "144"
व्याख्या :
Answer: C) 144 Explanation: Here the series follows, 194 194 - (1x1 - 1) = 194 194 - (2x2 - 1) = 191 191 - (3x3 - 1) = 183 183 - (4x4 - 1) = 168 168 - (5x5 - 1) = 144
प्र: One Word substitute : Extreme old age when a man behaves like a fool 4075 05b5cc6d8e4d2b4197774e787
5b5cc6d8e4d2b4197774e787- 1Superannuationfalse
- 2Imbecilityfalse
- 3Senilityfalse
- 4Dotagetrue
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उत्तर : 4. "Dotage"
व्याख्या :
Answer: D) Dotage Explanation:
प्र: Two boys are playing on a ground. Both the boys are less than 10 years old. Age of the younger boy is equal to the cube root of the product of the age of the two boys. If we place the digit representing the age of the younger boy to the left of the digit representing the age of the elder boy, we get the age of the father of the younger boy. Similarly, we place the digit representing the age of the elder boy to the left of the digit representing the age of the younger boy and divide the figure by 2, we get the age of the mother of the younger boy. The mother of the younger boy is younger than his father by 3 years. Then, what are the ages of elder and younger boys ? 4071 05b5cc73ae4d2b4197774f8ce
5b5cc73ae4d2b4197774f8ce- 1E = 15 & Y = 3false
- 2E = 14 & Y = 12false
- 3E = 40 & Y = 22false
- 4E = 4 & Y = 2true
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उत्तर : 4. "E = 4 & Y = 2"
व्याख्या :
Answer: D) E = 4 & Y = 2 Explanation: Let the the age of the elder boy = E Let the the age of the younger boy = Y Given that Y = cube root of EY => Y3 = EY => E = Y2 .....(1)By the condition of number replacement the age of the father is YE The Mother's age = EY/2 But she is 3 years less than father => EY/2 + 3 = YE2YE = EY + 6 ......(2) Then now from the given options we can identify which satisfies the all the conditions. Here Y =2 and E = 4 satisfies all the conditions.
प्र: In an election only two candidates contested. A candidate secured 70% of the valid votes and won by a majority of 172 votes. Find the total number of valid votes ? 4053 05b5cc6e2e4d2b4197774ec34
5b5cc6e2e4d2b4197774ec34- 1446false
- 2415false
- 3404false
- 4430true
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उत्तर : 4. "430"
व्याख्या :
Answer: D) 430 Explanation: Let the total number of valid votes be 'V'. 70% of V = 70/100 x V = 7V/10 Number of votes secured by the other candidate = V - 7V/100 = 3V/10 Given, 7V/10 - 3V/10 = 172 => 4V/10 = 172 => 4V = 1720 => V = 430.