IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Sneha’s weight is 140% of Veena’s weight. Rina’s weight is 90% of Sana’s weight. Sana weighs twice as much as Veena. If Sneha’s weight is x% of Rina’s weight, then x is equal to: 2013 05b5cc699e4d2b4197774c750
5b5cc699e4d2b4197774c750- 1596/9false
- 2605/9false
- 3645/9false
- 4700/9true
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उत्तर : 4. "700/9"
व्याख्या :
Answer: D) 700/9 Explanation: Let Veena's weight = 1 kg Sana's weight = 2 kg Sneha's weight = 1.4 kg Rina's weight = 1.8 kg Now,according to the given data in the question, 1.8x100 = 1.4 x = 1.4 × 1001.8 = 7009 = 77 79.
प्र: In e-FRRO, 'FRRO' stands for? 2012 05b5cc697e4d2b4197774c5e5
5b5cc697e4d2b4197774c5e5- 1Foreigners Reacceptance Registration Officefalse
- 2Foreigners Regional Registration Officetrue
- 3Foreigners Regaining Registration Officefalse
- 4Foreigners Registry Registration Officefalse
- उत्तर देखेंउत्तर छिपाएं
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उत्तर : 2. "Foreigners Regional Registration Office"
व्याख्या :
Answer: B) Foreigners Regional Registration Office Explanation: Home Minister Rajnath Singh launched the web-based application e-FRRO (e-Foreigners Regional Registration Office) scheme under which foreigners can avail, various visa and immigration-related services online. This will facilitate hassle-free travel to India for foreigners.
प्र: Negative divided by Negative 2011 05b5cc6aae4d2b4197774cf2e
5b5cc6aae4d2b4197774cf2e- 1-vefalse
- 2+vetrue
- 30false
- 4Can't be determinedfalse
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उत्तर : 2. "+ve"
व्याख्या :
Answer: B) +ve Explanation: We know the Mathematical rules that ++ = ++- = --+ = --- = +
प्र: Pavan and Sravan are two persons. If Pavan works with his actual efficiency and Sravan twice of his actual efficiency then it takes 25 days to complete the work. But If Pavan works twice of his actual efficiency and Sravan with his normal efficiency then the work is completed in 20 days. How many days would it take if Sravan alone works with his actual efficiency (in Days)? 2011 05b5cc6c7e4d2b4197774ded2
5b5cc6c7e4d2b4197774ded2- 150false
- 2100true
- 370false
- 435false
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उत्तर : 2. "100"
व्याख्या :
Answer: B) 100 Explanation: Let the Efficiency of pavan be E(P) Let the Efficiency of sravan be E(S) Here Work W = LCM(25,20) = 100 Now, E(P+2S) = 100/25 = 4 ....(1) E(2P+S) = 100/20 = 5 ....(2) Hence, from (1) & (2) we get E(S) = 1 => Number of days Savan alone work to complete the work = 100/1 = 100 days.
प्र: The average age of 7 boys is increased by 1 year when one of tem whose age is replaced by a girl. What is the age of the girl ? 2010 05b5cc6cae4d2b4197774e086
5b5cc6cae4d2b4197774e086- 133 yrsfalse
- 227 yrsfalse
- 321 yrsfalse
- 429 yrstrue
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उत्तर : 4. "29 yrs"
व्याख्या :
Answer: D) 29 yrs Explanation: Let the avg age of 7 boys be 'p' yearsLet the age of the girl be 'q' yearsFrom given data,The age of 7 boys = 7p yearsNow the new average = (p + 1) when 22 yrs is replaced by qNow the age of all 7 will become = 7(p + 1) yrsHence, 7p - 22 + q = 7(p + 1) yrs7p - 22 + q = 7p + 7q = 22 + 7 = 29 Therefore, the age of girl = q = 29 years.
प्र: What is a process whereby an Ecosystem can renew itself? 2010 05b5cc6abe4d2b4197774d01b
5b5cc6abe4d2b4197774d01b- 1Successiontrue
- 2Reconstructionfalse
- 3Cleansingfalse
- 4Purificationfalse
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उत्तर : 1. "Succession"
व्याख्या :
Answer: A) Succession Explanation: The process which wherein an Ecosystem may renew itself is known as Ecological Succession. The time scale may be decades or a million of years after a mass extinction. It may be achieve over a period of time.
प्र: What was the purpose of the double v campaign? 2010 05b5cc68be4d2b4197774c395
5b5cc68be4d2b4197774c395- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
The Double V Campaign was used in World War II. The purpose of the double v campaign is to fight for victory and ending segregation at home. It was aimed at African-Americans, and it first appeared in an African-American newspaper, the Pittsburgh Courier, in 1942. The Double V Campaign worked to have a victory over racism abroad and racism in the United States.It stood so it gave a chance for Black Americans to fight in the war so they could achieve Victory at Home and Abroad- (Civil Rights then the war in the Atlantic and Pacific).
प्र: On her deathbed, a grand mother called upon his three grand sons and told them to distribute all her assets worth Rs. 52,500 in the ratio of 1/35 : 1/21 : 1/15 amongst themselves. Find the smallest share amongst the three portions ? 2010 05b5cc761e4d2b4197774fd3f
5b5cc761e4d2b4197774fd3f- 1Rs. 5422false
- 2Rs. 10,500true
- 3Rs. 12,800false
- 4Rs. 15,000false
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उत्तर : 2. "Rs. 10,500"
व्याख्या :
Answer: B) Rs. 10,500 Explanation: The ratio of distribution should be: 21 x 15 : 15 x 35 : 35 x 21= 315 : 525 : 735 = 3 : 5 : 7The smallest share will be of worth: 3/15 x 52,500 = Rs. 10,500

