Wrong Number Series:
59, 41, 68, 33, 77, 23
Therefore, wrong no. is 33
9, 5, 6, 10.5, 23, 90, 183,
The solution is:
(9 + 1) * 0.5 = 5
(5 + 1) * 1 = 6
(6 + 1) * 1.5 = 10.5
(10.5 + 1) * 2 = 23
(23 + 1) * 2.5 = 60 ≠ 90
(60 + 1) * 3 = 183
Therefore, wrong no. is 90.
318, 168, 78, 38, 18, 8, 3
The solution is:
(3 + 1) * 2 = 8
(8 + 1) * 2 = 18
(18 + 1) * 2 = 38
(38 + 1) * 2 = 78
(78 + 1) * 2 = 158 ≠ 168
(158 + 1) * 2 = 318
Therefore, wrong no. is 168
3, 8, 18, 38, 80, 158, 318
The solution is:
3 * 2 + 2 = 8
8 * 2 + 2 = 18
18 * 2 + 2 = 38
38 * 2 + 2 = 78 ≠ 80
78 * 2 + 2 = 158
158 * 2 + 2 = 318
Therefore, wrong no. is 80
120, 143, 168, 195, 225, ?
(11)*11 – 1 = 120
11*13 = 143
13*131 = 168
13*15 = 195
15*151=225
15*17=255
Answer is 255 so, none of these.
32, 39, 65, 128, 253, 467
Therefore, wrong no. is 253
33, 39, 56, 85, 127, 185, 254
Therefore, it must be 42+14 = 56 i.e. 127+56 = 183
56+ 15 = 71 i.e. 183+ 71 = 254
Hence, wrong no. is 185
7, 9, 21, 67, 275, 1371, 8233
The solution is :
7 * 1 + 2 = 9
9 * 2 + 3 = 21
21 * 3 + 4 = 67
67 * 4 + 5 = 273 ≠ 275
273 * 5 + 6 = 1371
1371 * 6 + 7 = 8233
Therefore, wrong no. is 275
3, 6, 15, 45, 157, 630, 2835
The solution is :
3 * 2 = 6
6 * 2.5 = 15
15 * 3 = 45
45 * 3.5 = 157.5 ≠ 157
157.5 * 4 = 630
630 * 4.5 = 2835
Therefore, wrong no. is 157
5, 23, 43, 66, 94, 131
Because, difference of the difference is prime numbers in increasing order . therefore, wrong no. is 131
4, 2, 6, 0, 8, 4, 10
Therefore, wrong no. is 4
2478, 819, 257, 84, 24, 5
2478/3 – 7 = 819
819/3 – 6 = 267 ≠ 257
267/3 – 5 = 84
84/3 – 4 = 24
24/3 – 3 = 5
Therefore, the wrong no. is 257
3, 11, 34, 69, 131, 223
The solution is :
(1)3 + 2 = 3
(2)3 + 3 = 11
(3)3 + 4 = 31 ≠ 34
(4)3 + 5 = 69
(5)3 + 6 = 131
Therefore, the wrong no. is 34
9, 5, 9, 25, 95, 414
The solution is :
9 * .5 + .5 = 5
5 * 1.5 + 1.5 = 9
9 * 2.5 + 2.5 = 25
25 * 3.5 + 3.5 = 91 ≠ 95
91 * 4.5 + 4.5 = 414
Therefore wrong no. is 95
8, 18, 64, 272, 1395, 8424, 59045
Therefore, wrong no. is 64
47, 44, 45, 46, 33, 57, 3, 88
Therefore, wrong no. is 57
1, 8, 66, 460, 2758, 13785, 55146
The solution is :
1 * 9 – 1 = 8
8 * 8 + 2 = 66
66 * 7  3 =459 ≠ 460
459 * 6 + 4 = 2758
2758 * 5 – 5 = 13785
13785 * 4 + 6 = 55146
Therefore, wrong no. is 460
3, 7.5, 15, 37.5, 75, 167.5, 375
The solution is :
3 * 2.5 = 7.5
15 * 2.5 = 37.5
75 * 2.5 = 187.5 ≠ 167.5
7.5 * 2 = 15
37.5 * 2 = 75
187.5 * 2 = 375
Therefore, wrong no. is 167.5
4, 12, 42, 196, 1005, 6066, 42511
The solution is:
4 * 2 + (2)2 = 12
12 * 3 + (3)2 = 45 ≠ 42
45 * 4 + (4)2 = 196
196 * 5 + (5)2 = 1005
1005 * 6 + (6)2 = 6066
6066 * 7 +(7)2 = 2511
Therefore, wrong no. is 42
9, 7, 15, 44, 175, 874
The solution is :
9 * 1 – 1 = 8 ≠ 7
8 * 2 – 1 = 15
15 * 3 – 1 = 44
44 * 4 – 1 = 175
175 * 5 – 1 = 874
Therefore, wrong no. is 7
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