Books and Authors प्रश्न और उत्तर का अभ्यास करें
8प्र: Find the Next Number in the given number series? 3, 10.5, 36.75, 128.625, ? 1516 05b5cc6bae4d2b4197774d7a8
5b5cc6bae4d2b4197774d7a8- 1450.187true
- 2442.151false
- 3441.231false
- 4456.852false
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उत्तर : 1. "450.187"
व्याख्या :
Answer: A) 450.187 Explanation: Pattern is 3 3 x 3.5 = 10.5 10.5 x 3.5 = 36.75 36.75 x 3.5 = 128.625 128.625 x 3.5 = 450.187
प्र: Find the odd one in the number series given below ? 17, 9, 10, 18.5, 35, 90 1495 05b5cc6c5e4d2b4197774dd91
5b5cc6c5e4d2b4197774dd91- 19false
- 210false
- 318.5true
- 490false
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उत्तर : 3. "18.5"
व्याख्या :
Answer: C) 18.5 Explanation: The given series pattern follows 17 9 10 18.5 35 90 × 0.5 + 0.5, × 1 + 1, × 1.5 + 1.5, × 2 + 2, × 2.5 + 2.5 So here 17x0.5 + 0.5 = 9 9x1 + 1 = 10 10x1.5 + 1.5 = 16.5 16.5x2 + 2 = 35 35x2.5 + 2.5 = 90 Here the odd man in the given series is 18.5
प्र: Find out the wrong term in the following number series. 4, 16, 37, 58, 81. 1479 05b5cc6cae4d2b4197774e09a
5b5cc6cae4d2b4197774e09a- 116false
- 237false
- 381true
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उत्तर : 3. "81"
व्याख्या :
Answer: C) 81 Explanation: The series follows the following pattern. 4 16 = 42 37 = 12+62 58 = 32+72 81 ≠52+82. Here every number is based on the digits of previous number. Hence, 81 is the wrong number in the given series.
प्र: In the following number series only one number is wrong. Find out the wrong number ? 6, 15, 35, 63, 143, 221, 323 1475 05b5cc6c8e4d2b4197774df41
5b5cc6c8e4d2b4197774df41- 1143false
- 263true
- 3323false
- 435false
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उत्तर : 2. "63"
व्याख्या :
Answer: B) 63 Explanation: Here the series follows the pattern that, product of succesive prime numbers i.e, 2 × 3 = 6 3 × 5 = 15 5 × 7 = 35 7 × 11 = 77 11 × 13 = 143 13 × 17 = 221 17 × 19 = 323 So here in place of 77 the number 63 is written. So the wrong number is 63.
प्र: Find the sum of the Arithmetic Series upto 36 terms 2, 5, 8, 11,... 1453 15b5cc6afe4d2b4197774d259
5b5cc6afe4d2b4197774d259- 13924false
- 21962true
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उत्तर : 2. "1962"
व्याख्या :
Answer: B) 1962 Explanation: Arithmetic Series :: An Arithmetic Series is a series of numbers in which each term increases by a constant amount. How to find the sum of the Arithmetic Sequence or Series for the given Series :: When the series contains a large amount of numbers, its impractical to add manually. You can quickly find the sum of any arithmetic sequence by multiplying the average of the first and last term by the number of terms in the sequence. That is given by Sn = n(a1 + an)2 Where n = number of terms, a1 = first term, an = last term Here Last term is given by an = a1 + n-1d where d = common difference Now given Arithmetic Series is 2, 5, 8, 11,... Here a1 = 2, d = 3, n = 36 Now, an= a1 + n - 1d a36= 2 + 36 - 13 = 105 + 2 = 107 Now, Sum to 36 terms is given by S36 = 36(2 + 107)2 = 36 x 1092 = 39242 = 1962 Therefore, Sum to 36 terms of the series 2, 5, 8, 11,... is 1962.
प्र: Find the odd one out of the group ? 1439 05b5cc6e1e4d2b4197774ebca
5b5cc6e1e4d2b4197774ebca- 1708false
- 2392true
- 3618false
- 4816false
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उत्तर : 2. "392"
व्याख्या :
Answer: B) 392 Explanation: The sum of the digits in 708, 618 and 816 is 15, but not in 392.
प्र: What is the next number in this series ? 4, 6, 12, 18, 30, 42, 60, ? 1410 05b5cc70be4d2b4197774f2f0
5b5cc70be4d2b4197774f2f0- 171false
- 272true
- 373false
- 469false
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उत्तर : 2. "72"
व्याख्या :
Answer: B) 72 Explanation: With close observation, you will note that each number in the list is in the middle of two prime numbers. Thus: 4 is in the middle of 3 and 5, 6 is in the middle of 5 and 7, 12 is in the middle of 11 and 13, 18 is in the middle of 17 and 19, 30 is in the middle of 29 and 31. 42 is in the middle of 41 and 43, 60 is in the middle of 59 and 61. Therefore, the next number would be the one that is in the middle of the next two prime numbers, which is 72 (which is in the middle of 71 and 73).
प्र: The President of India, Shri Pranab Mukherjee received the first copy of a book“President Pranab Mukherjee – A Statesman” on 2ndJuly 2017 from ________ at a function held at Rashtrapati Bhavan. 1394 05b5cc6d2e4d2b4197774e433
5b5cc6d2e4d2b4197774e433- 1Sumitra Mahajanfalse
- 2Arun Jaitleyfalse
- 3Hamid Ansarifalse
- 4Narendra Moditrue
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उत्तर : 4. "Narendra Modi"
व्याख्या :
Answer: D) Narendra Modi Explanation: The President expressed his gratitude to The Statesman for bringing out a photo essay on the 13th Presidency. He appreciated the wonderful photos taken by Shri Varun Joshi from The Statesman that feature in the photo essay. Prime Minister, Shri Narendra Modi said that the photo essay was important from the historical perspective.