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  4. Number Series 3
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1:

Series मा कुन गलत छ ?
२, ५ , १० , १७ , २६, ३७ , ५० , ६४, 
Correct Answer : ६४

Explanation:

12+1, 22+1……

2:

Series मा कुन गलत छ?
१५० , ४५० , ७५० , १०६० , १३५० , १६५० , १९५० 
Correct Answer : १०६०

Explanation:

प्रत्येक टर्ममा 300 जोडेर, हामीले अर्को टर्म पाउँछौं। 1060 गलत शब्द हो। यो 1050 हुनुपर्छ।

3:

Series मा कुन संख्या गलत छ ?
३, ५, ११, १४, १७, २१
Correct Answer : १४

Explanation:

14 बाहेक प्रत्येक संख्या एक बिजोर संख्या हो।संख्या '14' मात्र जोर नम्बर हो।

4:

Series मा कुन संख्या गलत छ ?
८, २७, ६४, १००, १२५, २१६, ३४३
Correct Answer : १००

Explanation:

The pattern is 23, 33, 43, 53, 63, 73. But, 100 is not a perfect cube.

5:
Series मा कुन संख्या गलत छ?
6, 9, 15, 21, 24, 28, 30
Correct Answer : २८

Explanation:

28 बाहेक प्रत्येक संख्या 3 को गुणन हो।

6:

Series मा कुन संख्या गलत छ?
३९६, ४६२, ५७२, ४२७, ६७१, २६४
Correct Answer : ४२७

Explanation:

427 बाहेक प्रत्येक संख्यामा, बीचको अंक अन्य दुईको योगफल हो।

7:

Series मा कुन संख्या गलत छ?
१०, २५, ४५, ५४, ६०, ७५, ८०
Correct Answer : ५४

Explanation:

54 बाहेक प्रत्येक संख्या 5 को गुणन हो।

8:

Series मा कुन संख्या गलत छ?
१, ४, ९, १६, २३, २५, ३६
Correct Answer : २३

Explanation:

23 बाहेक प्रत्येक संख्या पूर्ण वर्ग हो।

9:

Series मा कुन संख्या गलत छ?
१, ४, ९, १६, २०, ३६, ४९
Correct Answer : २०

Explanation:

२० पुर्ण बर्ग होइन

10:

Series मा कुन संख्या गलत छ?
२, ५, १०, १७, २६, ३७, ५०, ६४
Correct Answer : ६४

Explanation:

(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1

But, 64 is out of pattern.

11:

Series मा कुन संख्या गलत छ?
10, 14, 16, 18, 21, 24, 26
Correct Answer : 21

Explanation:

21 बाहेक प्रत्येक संख्या एक सम संख्या हो।

12:

Series मा कुन संख्या गलत छ?
16, 25, 36, 72, 144, 196, 225
Correct Answer : 72

Explanation:

72 बाहेक प्रत्येक संख्या एक पूर्ण वर्ग हो।

13: Series मा कुन संख्या गलत छ?
331, 482, 551, 263, 383, 362, 284
Correct Answer : 383

Explanation:

383 बाहेक प्रत्येक संख्यामा, पहिलो र तेस्रो अंकको गुणन मध्य एक हो।

14:

Series मा कुन संख्या गलत छ?
835, 734, 642, 751, 853, 981, 532
Correct Answer : 751

Explanation:

751 बाहेक प्रत्येक संख्यामा, तेस्रो र पहिलो अंकको भिन्नता बीचको अंक हो।

15: Series मा कुन संख्या गलत छ?
41, 43, 47, 53, 61, 71, 73, 81
Correct Answer : 81

Explanation:

81 बाहेक प्रत्येक संख्या एक अभाज्य संख्या हो।

16: Series मा कुन संख्या गलत छ?
3, 5, 7, 12, 17, 19
Correct Answer : 12

Explanation:

12 बाहेक प्रत्येक संख्या एक प्रमुख संख्या हो।

17:

Series मा कुन संख्या गलत छ?
121, 143, 165, 186, 209
Correct Answer : 186

Explanation:

शृङ्खलाको प्रत्येक पदलाई अघिल्लो पदमा 22 थपेर प्राप्त गरिन्छ।
त्यसैले, 186 गलत छ र (165 + 22) अर्थात् 187 हुनुपर्छ।

18:

Series मा कुन संख्या गलत छ?
6, 15, 35, 77, 165, 221
Correct Answer : 165

Explanation:

The terms of the series are products of two consecutive prime numbers i.e. (2 x 3),(3 x 5), (5 x 7), (7 x 11),.....
So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.

19: Series मा कुन संख्या गलत छ?
8, 13, 21, 32, 47, 63, 83
Correct Answer : 47

Explanation:

The correct pattern is + 5, + 8, + 11, + 14,.....
So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.

20: Series मा कुन संख्या गलत छ?
1, 2, 4, 8, 16, 32, 64, 96
Correct Answer : 96

Explanation:

Each term of the series is obtained by multiplying the preceding term by 2.
So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.

21: Series मा कुन संख्या गलत छ?
3, 4, 10, 32, 136, 685, 4116
Correct Answer : 32

Explanation:

The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....
So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.

22: Series मा कुन संख्या गलत छ?
105, 85, 60, 30, 0, - 45, - 90
Correct Answer : 0

Explanation:

The correct pattern is - 20, - 25, - 30,.....So, 0 is wrong and must be replaced by (30 - 35) i.e. - 5.

23: Series मा कुन संख्या गलत छ?
2, 5, 10, 17, 26, 37, 50, 64
Correct Answer : 64

Explanation:

The terms of the series are (12 + 1), (22 + 1), (32 + 1), (42 + 1), (52 + 1), (62 + 1),(72+1),.....
So, 64 is wrong and must be replaced by (82 + 1) i.e. 65.

24: Series मा कुन संख्या गलत छ?
125, 126, 124, 127, 123, 129
Correct Answer : 129

Explanation:

The correct pattern is + 1, - 2, + 3, - 4, + 5.So, 129 is wrong and must be replaced by (123 + 5) i.e. 128.

25: Series मा कुन संख्या गलत छ?
2, 5, 10, 50, 500, 5000
Correct Answer : 5000

Explanation:

Each term of the series is the product of the preceding two terms.So, 5000 is wrong and must be replaced by (50 x 500) i.e. 25000.

26: Series मा कुन संख्या गलत छ?
1,3,12,25,48
Correct Answer : 25

Explanation:

The terms of the series are (l2 - 02), (22 - l2), (42 - 22), (62 - 32) and (82 - 42).So, 25 is wrong and must be replaced by (62 - 32) i.e. 27.

27: Series मा कुन संख्या गलत छ?
15, 16, 22, 29, 45, 70
Correct Answer : 22

Explanation:

The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e. + 12, + 22, + 32, + 42, + 52.So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.

28: Series मा कुन संख्या गलत छ?
8, 14, 26, 48, 98, 194, 386
Correct Answer : 48

Explanation:

The correct pattern is x 2 - 2.So, 48 is wrong and must be replaced by (26 x 2 - 2) i.e. 50.

29: Series मा कुन संख्या गलत छ?
3, 10, 27, 4, 16, 64, 5, 25, 125
Correct Answer : 10

Explanation:

The correct sequence is 3, 32, 33, 4, 42, 43, 5, 52, 53.So, 10 is wrong and must be replaced by 32 i.e. 9.

30: Series मा कुन संख्या गलत छ?
1, 5, 9, 15, 25, 37, 49
Correct Answer : 15

Explanation:

The terms of the given series are 12, (22 + 1), 32, (42..+ 1), 52, (62 + 1), 72.So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.

31:

Series मा कुन संख्या गलत छ?
4, 10, 22, 46, 96, 190, 382
Correct Answer : 96

Explanation:

The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192. So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.

32: Series मा कुन संख्या गलत छ?
2, 6, 24, 96, 285, 568, 567
Correct Answer : 24

Explanation:

The correct pattern is x 6 - 6, x 5 - 5, x 4 - 4,..... So, 24 is wrong and must be replaced by (6 x 5 - 5) i.e. 25.

33: Series मा कुन संख्या गलत छ?
3, 2, 8, 9, 13, 22, 18, 32, 23, 42
Correct Answer : 9

Explanation:

The given sequence is a combination of two series: I. 3, 8, 13, 18, 23, and II. 2, 9, 22, 32, 42
The pattern in I is + 5, and the pattern in II is + 10. So, in II, 9 is wrong and must be replaced by (2 + 10) i.e. 12.

34: Series मा कुन संख्या गलत छ?
196, 169, 144, 121, 101
Correct Answer : 101

Explanation:

The sequence is (14)2, (13)2, (12)2, (11)2, (10)2.So, 101 is wrong and must be replaced by (10)2 i.e. 100.

35:

Series मा कुन संख्या गलत छ?
325, 259, 202, 160, 127, 105, 94
Correct Answer : 202

Explanation:

The correct pattern is - 66, - 55, - 44, - 33, - 22, - 11. So, 202 is wrong and must be replaced by (259 - 55) i.e. 204.

36:
Series मा कुन संख्या गलत छ?
1236, 2346, 3456, 4566, 5686
Correct Answer : 5686

Explanation:

The correct pattern in the series is + 1110. So, 5686 is wrong and must be replaced by (4566 + 1110) i.e. 5676.

37: Series मा कुन संख्या गलत छ?
93, 309, 434, 498, 521, 533
Correct Answer : 521

Explanation:

The correct pattern is + 63, + 53, + 43, + 33, .....So, 521 is wrong and must be replaced by (498 + 33) i.e. 525.