Bank Exams प्रश्न और उत्तर का अभ्यास करें
8प्र: The series of differences between consecutive prime numbers is represented as Cp1, Cp2, Cp3, .... Cpn , Whare Cp1 is the difference between the second and the first prime number. Find the sum of series when n = 23, given that the 23rd prime number is 83 ? 1925 05b5cc6fbe4d2b4197774f09f
5b5cc6fbe4d2b4197774f09f- 187true
- 281false
- 383false
- 485false
- उत्तर देखेंउत्तर छिपाएं
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उत्तर : 1. "87"
व्याख्या :
Answer: A) 87 Explanation: Cp1 = p2 - p1 , Cp2 = p3 - p2 ......Cp23 = p24 - p23Sum of series = (p2-p1) + (p3-p2) + .....(p23-p22) + (p24-p23)All terms get cancelled, except p1 = 2 and p24 = 89 So Sum = -p1 + p24Sum of series = -2 + 89 = 87
प्र: 14 persons are seated around a circular table. Find the probability that 3 particular persons always seated together. 1923 05b5cc6b6e4d2b4197774d5b8
5b5cc6b6e4d2b4197774d5b8- 111/379false
- 221/628false
- 324/625true
- 426/247false
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उत्तर : 3. "24/625"
व्याख्या :
Answer: C) 24/625 Explanation: Total no of ways = (14 – 1)! = 13! Number of favorable ways = (12 – 1)! = 11! So, required probability = 11!×3!13! = 39916800×66227020800 = 24625
प्र: How many seconds in 10 years? 1923 05b5cc695e4d2b4197774c534
5b5cc695e4d2b4197774c534- 131523500 secfalse
- 2315360000 sectrue
- 3315423000 secfalse
- 4315354000 secfalse
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उत्तर : 2. "315360000 sec"
व्याख्या :
Answer: B) 315360000 sec Explanation: We know that, 1 year = 365 days 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds. Then, 1 year = 365 x 24 x 60 x 60 seconds. = 8760 x 3600 1 year = 31536000 seconds. Hence, 10 years = 31536000 x 10 = 315360000 seconds.
प्र: What is the science of mapmaking called? 1922 05b5cc62ae4d2b4197774b8d7
5b5cc62ae4d2b4197774b8d7- 1Coriographyfalse
- 2Cartographytrue
- 3Photograrnmetryfalse
- 4Mappingfalse
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उत्तर : 2. "Cartography"
व्याख्या :
Answer: B) Cartography Explanation: The art and science of map making is called Cartography.
प्र: What important polymer is located in the nucleus? 1921 05b5cc611e4d2b4197774b650
5b5cc611e4d2b4197774b650- 1Ribosomesfalse
- 2Chromosomesfalse
- 3DNAtrue
- 4Proteinsfalse
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उत्तर : 3. "DNA"
व्याख्या :
Answer: C) DNA Explanation: The most important polymer present in the nucleus is DNA- the master molecule. It is a polymer of Nucleotides.
प्र: The state of california uses a mechanism known as 1921 05b5cc666e4d2b4197774beee
5b5cc666e4d2b4197774beee- 1NOTStrue
- 2BOTSfalse
- 3LOTSfalse
- 4POTSfalse
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उत्तर : 1. "NOTS"
व्याख्या :
Answer: A) NOTS Explanation: The state of California uses a mechanism known as NOTS. NOTS stands for Negligent Operator Treatment System. What is this: It is a program that is known to rehabilitate chronic violators of the driving laws in California. It consists of a series of computer generated warning letters and sanctions against violators. It affects drivers with age 18 years old and above in California. How it works: The actions in this program are based on "negligent operator points" that is being recorded every time period. These are added continuously until it reaches a certain degree which it needs an administrative hearing. Points are being assigned depending on the degree of the offense. It would range from zero to three points.
प्र: Find the number which multiplied by 15 is increased by 56 ? 1920 05b5cc6e2e4d2b4197774ec43
5b5cc6e2e4d2b4197774ec43- 16false
- 24true
- 33false
- 412false
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उत्तर : 2. "4"
व्याख्या :
Answer: B) 4 Explanation: Let the number be x. Then, 15x - x = 56 x = 4
प्र: Mary is 12 years younger to Pinky. After 3 years, the ratio of their ages will be 5:8. If the present age of Sam is the sum of ages of Mary and Pinky, then what was the age of Sam 15 years back ? 1920 05b5cc6cae4d2b4197774e068
5b5cc6cae4d2b4197774e068- 131 yearstrue
- 237 yearsfalse
- 346 yearsfalse
- 429 yearsfalse
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उत्तर : 1. "31 years"
व्याख्या :
Answer: A) 31 years Explanation: Let the present age of Pinky be x years Then the age of Mary is x - 12 years After 3 years, Ratio of MaryPinky = x - 9x + 3 = 58 8x - 72 = 5x +15 => 3x = 87 => x = 29 => Age of Pinky = 29 years => Age of Mary = 29 - 12 = 17 years Present age of Sam = 29 + 17 = 46 Before 15 years Sam age = 46 - 15 = 31 years.