IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: 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 ? 6777 05b5cc6d4e4d2b4197774e5ca
5b5cc6d4e4d2b4197774e5ca- 11.8 kmphfalse
- 22 kmphfalse
- 32.2 kmphfalse
- 41.5 kmphtrue
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उत्तर : 4. "1.5 kmph"
व्याख्या :
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
प्र: If HAT is coded as 'jcv' then what will GUN be coded as? 6772 05b5cc6bde4d2b4197774d915
5b5cc6bde4d2b4197774d915- 1iwptrue
- 2IKMfalse
- 3kipfalse
- 4Klpfalse
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उत्तर : 1. "iwp"
व्याख्या :
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
प्र: Which of the following is a true statement about Intranet and Internet ? 6762 05b5cc6c8e4d2b4197774df3c
5b5cc6c8e4d2b4197774df3c- 1Encryption is necessaryfalse
- 2They use similar protocolfalse
- 3Speed is slowfalse
- 4They use the same protocoltrue
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उत्तर : 4. "They use the same protocol"
व्याख्या :
Answer: D) They use the same protocol Explanation:
प्र: Which Crop is Sown on the Largest Area in India? 6747 05b5cc6b5e4d2b4197774d55e
5b5cc6b5e4d2b4197774d55e- 1Wheatfalse
- 2Barleyfalse
- 3Ricetrue
- 4Maizefalse
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उत्तर : 3. "Rice"
व्याख्या :
Answer: C) Rice Explanation: India is the second largest producer of Rice in the World. Rice is the most cultivated crop in India. According to 2002-2003 census, about 33 million hectares of area in India was cultivated with Rice.
प्र: How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order? 6743 05b5cc7f2e4d2b41977751e93
5b5cc7f2e4d2b41977751e93- 1Nonefalse
- 2Onefalse
- 3Twofalse
- 4Threetrue
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उत्तर : 4. "Three"
व्याख्या :
Answer: D) Three Explanation: Given Number: 4 2 1 5 7 9 3 6 8 Ascending order: 1 2 3 4 5 6 7 8 9 Hence the required pairs are 12, 49, 16
प्र: What has a spine but no bones? 6724 05b5cc672e4d2b4197774c0be
5b5cc672e4d2b4197774c0be- 1Mirrorfalse
- 2Booktrue
- 3Tablefalse
- 4None of the abovefalse
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उत्तर : 2. "Book"
व्याख्या :
Answer: B) Book Explanation: A book has a spine to hold all the pages, but it has no bones.
प्र: Find the next number in te given series ? 5, 25, 61, 113, ... 6703 05b5cc718e4d2b4197774f4d1
5b5cc718e4d2b4197774f4d1- 1142false
- 2181true
- 3156false
- 4179false
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उत्तर : 2. "181"
व्याख्या :
Answer: B) 181 Explanation: Here the series follow the rule that 12+22 = 5 32+42 = 2552+62 = 61 72+82 = 113 SO NEXT IS, 92+102 = 181
प्र: A sweet seller sells 3/5th part of sweets at a profit of 10% and remaining at a loss of 5%. If the total profit is Rs 1500, then what is the total cost price of sweets ? 6697 05b5cc75ee4d2b4197774fc93
5b5cc75ee4d2b4197774fc93- 1Rs.37,500true
- 2Rs.36,400false
- 3Rs.37,415false
- 4Rs.36,500false
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उत्तर : 1. "Rs.37,500"
व्याख्या :
Answer: A) Rs.37,500 Explanation: Assume A be the cost price. Therefore,35×A×10100 - 25×A×5100 = 1500 => A = Rs 37,500.