3, 5, 11, 14, 17, 21
21
17
14
3
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Answer : Option C
Explanation :
Each of the numbers except 14 is an odd number.
The number '14' is the only EVEN number.
8, 27, 64, 100, 125, 216, 343
27
100
125
343
Answer : Option B
The pattern is 23, 33, 43, 53, 63, 73. But, 100 is not a perfect cube.
10, 25, 45, 54, 60, 75, 80
10
45
54
75
Each of the numbers except 54 is multiple of 5.
396, 462, 572, 427, 671, 264
396
427
671
264
In each number except 427, the middle digit is the sum of other two.
6, 9, 15, 21, 24, 28, 30
28
24
30
Answer : Option A
Each of the numbers except 28, is a multiple of 3
1, 4, 9, 16, 23, 25, 36
9
23
25
36
Each of the numbers except 23, is perfect square.
1, 4, 9, 16, 20, 36, 49
1
20
49
The pattern is 12, 22, 32, 42, 52, 62, 72. But, instead of 52, it is 20 which to be turned out.
2, 5, 10, 17, 26, 37, 50, 64
50
26
376
64
Answer : Option D
(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.
10, 14, 16, 18, 21, 24, 26
18
Each of the numbers except 21 is an even number.
16, 25, 36, 72, 144, 196, 225
72
196
225
Each of the numbers except 72 is a perfect square.
331, 482, 551, 263, 383, 362, 284
263
383
331
551
In each number except 383, the product of first and third digits is the middle one.
835, 734, 642, 751, 853, 981, 532
751
853
532
In each number except 751, the difference of third and first digit is the middle one.
41, 43, 47, 53, 61, 71, 73, 81
61
71
73
81
Each of the numbers except 81 is a prime number.
3, 5, 7, 12, 17, 19
19
5
12
Each of the numbers is a prime number except 12.
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