IIT JEE Practice Question and Answer
8Q: What are the four main functions of a computer? 2013 05b5cc6b7e4d2b4197774d638
5b5cc6b7e4d2b4197774d638- 1Data, information, bits and bytesfalse
- 2Hardware, software, modeling and operationsfalse
- 3Input, processing, output and storagetrue
- 4Learning, thinking, intelligence and virtuosityfalse
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Answer : 3. "Input, processing, output and storage"
Explanation :
Answer: C) Input, processing, output and storage Explanation: The four main functions of a computer are :: 1. Input, 2. Processing, 3. Output and 4. Storage
Q: A person travels from K to L a speed of 50 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips ? 2013 05b5cc6d8e4d2b4197774e764
5b5cc6d8e4d2b4197774e764- 155 kmphfalse
- 258 kmphfalse
- 360 kmphtrue
- 466 kmphfalse
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Answer : 3. "60 kmph"
Explanation :
Answer: C) 60 kmph Explanation: Speed on return trip = 150% of 50 = 75 km/hr. Average speed = (2 x 50 x 75)/(50 + 75) = 60 km/hr.
Q: Negative divided by Negative 2011 05b5cc6aae4d2b4197774cf2e
5b5cc6aae4d2b4197774cf2e- 1-vefalse
- 2+vetrue
- 30false
- 4Can't be determinedfalse
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Answer : 2. "+ve"
Explanation :
Answer: B) +ve Explanation: We know the Mathematical rules that ++ = ++- = --+ = --- = +
Q: 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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Answer : 2. "100"
Explanation :
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.
Q: What was the purpose of the double v campaign? 2011 05b5cc68be4d2b4197774c395
5b5cc68be4d2b4197774c395- Show AnswerHide Answer
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Answer :
Explanation :
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).
Q: 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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Answer : 4. "29 yrs"
Explanation :
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.
Q: What is a process whereby an Ecosystem can renew itself? 2010 05b5cc6abe4d2b4197774d01b
5b5cc6abe4d2b4197774d01b- 1Successiontrue
- 2Reconstructionfalse
- 3Cleansingfalse
- 4Purificationfalse
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Answer : 1. "Succession"
Explanation :
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.
Q: 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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Answer : 2. "Rs. 10,500"
Explanation :
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