In the given series 1 4 9 16 22 36
1 = 1 x 1
4 = 2 x 2
9 = 3 x 3
16 = 4 x 4
25 = 5 x 5 (Not 22)
36 = 6 x 6
Hence, the odd man in the series is 22.
The given number series is 152, 124, 96, 69, 40
152
152 - 28 = 124
124 - 28 = 96
96 - 28 = 68 (not 69)
68 - 28 = 40
Hence, the odd man in the given number series is 69.
Here the series follows,
194
194 - (1x1 - 1) = 194
194 - (2x2 - 1) = 191
191 - (3x3 - 1) = 183
183 - (4x4 - 1) = 168
168 - (5x5 - 1) = 144
2.5 × 1 + 1 = 3.5
3.5 × 2 + 2 = 9
9 × 4 + 4 = 40
40 × 8 + 8 = 328
The given number series is 8, 16, 20, 36, 68
8
8 x 2 - 4 = 12 (NOT 16)
12 x 2 - 4 = 20
20 x 2 - 4 = 36
36 x 2 - 4 = 68
Hence, the odd man in the given series is 16.
In the given series numbers are arranged following the rule,
Therefore, the missing number is 27.
The given number series follows a pattern that
5 x 5 ? 1 = 24
24 x 4 ? 2 = 94
94 x 3 ? 3 = 279
279 x 2 ? 4 = 554
343 = , 1331 = , 2197 = , 121 =
343, 1331, 2197 are perfect cubes, but not 121.
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.
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.
So, 150 is wrong.
The given number series follows a pattern that
196, 169, 144, 121, 100, 81, ?
-27 -25 -23 -21 -19 -17
=> 81 - 17 = 64
Therefore, the series is 196, 169, 144, 121, 100, 81, 64.
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