Directions (1-15): In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.
Q1. 280, 231, 195, 175, 154, 145, 141
(a)280
(b)175
(c)195
(d)145
(e)141
Q2. 25, 27.5, 32.5, 42, 50, 62.5, 77.5
(a)25
(b)32.5
(c)50
(d)42
(e)77.5
Q3. 3375, 169, 1331, 100, 343, 25, 27
(a)343
(b)1331
(c)27
(d)169
(e)100
Q4. 9, 5, 6, 10.5, 23, 62, 183
(a)62
(b)9
(c)183
(d)23
(e)5
Q5. 216, 36, 180, 45, 140, 67.5, 67.5
(a)36
(b)216
(c)140
(d)67.5
(e)180
Q6. 140, 144, 148, 154, 162, 172, 184j
(a)140
(b)144
(c)148
(d)154
(e)172
Q7. 520, 509, 487, 454, 410, 355, 290
(a)520
(b)410
(c)487
(d)509
(e)290
Q8. 215, 200, 250, 175, 275, 150, 300
(a)150
(b)300
(c)250
(d)215
(e)200
Q9. 1, 3, 5, 9, 17, 33, 65
(a)3
(b)1
(c)65
(d)17
(e)33
Q10. 18, 26, 42, 50, 66, 74, 92
(a)66
(b)50
(c)92
(d)18
(e)74
Q11. 20, 22, 24, 42, 90, 190, 370
(a)370
(b)20
(c)42
(d)90
(e)22
Q12. 32, 70, 120, 173, 238, 312, 395
(a)120
(b)32
(c)395
(d)312
(e)173
Q13. 3, 4, 7, 11, 18, 29, 47, 77
(a)47
(b)29
(c)18
(d)77
(e)11
Q14. 50, 52, 64, 94, 150, 240, 376
(a)52
(b)376
(c)94
(d)150
(e)240
Q15. 50, 59, 75, 100, 138, 185, 249
(a)185
(b)50
(c)138
(d)249
(e)75
Solutions














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