IIT JEE Practice Question and Answer
8Q: If HAT is coded as 'jcv' then what will GUN be coded as? 7046 05b5cc6bde4d2b4197774d915
5b5cc6bde4d2b4197774d915- 1iwptrue
- 2IKMfalse
- 3kipfalse
- 4Klpfalse
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Answer : 1. "iwp"
Explanation :
Answer: A) iwp Explanation: Here HAT is coded as jcv => Leaving a letter in between i.e, after H leave i write j in small letters In the same way, A => c, T => v Similarly for GUN => iwp
Q: A number of cats got together and decided to kill between them 999919 rats. Every cat killed an equal number of rats. Each cat killed more rats than there were cats. How many rats do you think that each cat killed ? 7035 05b5cc731e4d2b4197774f7d8
5b5cc731e4d2b4197774f7d8- 11009true
- 2991false
- 32000false
- 41000false
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Answer : 1. "1009"
Explanation :
Answer: A) 1009 Explanation: Given total number of rats = 999919 999919 = 1000000 - 81 = 10002 - 92 = (1000+9)(1000-9) = 1009 x 991.Since there were more rats than there were cats, 991 cats killed 1009 rats each.
Q: A boy can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is ? 7031 05b5cc6d4e4d2b4197774e5ca
5b5cc6d4e4d2b4197774e5ca- 11.8 kmphfalse
- 22 kmphfalse
- 32.2 kmphfalse
- 41.5 kmphtrue
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Answer : 4. "1.5 kmph"
Explanation :
Answer: D) 1.5 kmph Explanation: Speed of Boy is B = 4.5 kmph Let the speed of the stream is S = x kmph Then speed in Down Stream = 4.5 + x speed in Up Stream = 4.5 - x As the distance is same, => 4.5 + x = (4.5 - x)2 => 4.5 + x = 9 -2x 3x = 4.5 x = 1.5 kmph
Q: A web page is located using a 6992 05b5cc639e4d2b4197774baa5
5b5cc639e4d2b4197774baa5- 1Universal Record Locatorfalse
- 2Universal Resource Locatortrue
- 3Uniform Record Linkingfalse
- 4Universal Record Linkingfalse
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Answer : 2. "Universal Resource Locator"
Explanation :
Answer: B) Universal Resource Locator Explanation: A web page is located using a URL (Universal Resource Locator). Universal Resource Locator is also known as web address. It basically refers to a web resource which is meant for the specification of its location on the network of computer. It is also a mechanism through which information can be retrieved.
Q: 10 men and 15 women together can complete a work in 6 days. It takes 100 days for one man alone to complete the same work. How many days will be required for one woman alone to complete the same work? 6921 05b5cc68be4d2b4197774c385
5b5cc68be4d2b4197774c385- 1215 daysfalse
- 2225 daystrue
- 3235 daysfalse
- 4240 daysfalse
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Answer : 2. "225 days"
Explanation :
Answer: B) 225 days Explanation: Given that (10M + 15W) x 6 days = 1M x 100 days => 60M + 90W = 100M => 40M = 90W => 4M = 9W. From the given data, 1M can do the work in 100 days => 4M can do the same work in 100/4= 25 days. => 9W can do the same work in 25 days. => 1W can do the same work in 25 x 9 = 225 days. Hence, 1 woman can do the same work in 225 days.
Q: 3 men, 4 women and 6 children can complete a work in 7 days. A woman does double the work a man does and a child does half the work a man does. How many women alone can complete this work in 7 days ? 6879 05b5cc6e5e4d2b4197774ecfc
5b5cc6e5e4d2b4197774ecfc- 16false
- 29false
- 35false
- 47true
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Answer : 4. "7"
Explanation :
Answer: D) 7 Explanation: Let 1 woman's 1 day work = x. Then, 1 man's 1 day work = x/2 and 1 child's 1 day work x/4. So, (3x/2 + 4x + + 6x/4) = 1/7 28x/4 = 1/7 => x = 1/49 1 woman alone can complete the work in 49 days. So, to complete the work in 7 days, number of women required = 49/7 = 7.
Q: A and B invests Rs.8000 and Rs.9000 in a business. After 4 months, A withdraws half of his capital and 2 months later, B withdraws one-third of his capital. In what ratio should they share the profits at the end of the year ? 6864 05b5cc6e5e4d2b4197774ed38
5b5cc6e5e4d2b4197774ed38- 121:29false
- 241:54false
- 332:45true
- 437:51false
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Answer : 3. "32:45"
Explanation :
Answer: C) 32:45 Explanation: A : B(8000x4)+(4000x8) : (9000x6)+(6000x6) 64000 : 90000=> 32 : 45
Q: It takes five minutes to pass a rumour from one person to two other persons. The tree of rumour continues. Find how many minutes does it take spread the rumour to 729 persons ? 6823 05b5cc715e4d2b4197774f44a
5b5cc715e4d2b4197774f44a- 145 minfalse
- 225 minfalse
- 330 mintrue
- 436 minfalse
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Answer : 3. "30 min"
Explanation :
Answer: C) 30 min Explanation: After 5 mins ..... 3 persons will get rumourAfter 10 mins .... 3x2 + 3 = 9 = 32 persons will get after 15 =5x3 min ......9x2 + 9 =27 = 33 persons will get news...after 5x6 mins ... 36 = 729 persons will get news. Therefore, time taken to spread the rumour to 729 persons is 30 minutes.