Directions (1 – 10): In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.
Q1. 512, 504, 488, 466, 432, 392, 344
(a)512
(b)466
(c)344
(d)392
(e)432
Q2. 512, 255, 127, 63, 31, 15
(a)15
(b)31
(c)127
(d)512
(e)63
Q3. 221, 263, 313, 370, 434, 505, 583
(a)313
(b)505
(c)434
(d)263
(e)221
Q4. 35, 37, 49, 79, 137, 225, 357
(a)137
(b)35
(c)225
(d)357
(e)79
Q5. 14, 30, 66, 130, 230, 374, 568
(a)14
(b)374
(c)568
(d)66
(e)130
Q6. 2, 7, 42, 210, 840, 2520, 5040
(a)2
(b)210
(c)2520
(d)42
(e)7
Q7. 1250, 1249, 1240, 1215, 1166, 1085, 965
(a)1250
(b)1166
(c)1085
(d)1240
(e)965
Q8. 34, 66, 126, 244, 478, 944, 1874
(a)126
(b)244
(c)478
(d)34
(e)66
Q9. 254, 302, 358, 422, 494, 574, 660
(a)494
(b)660
(c)302
(d)422
(e)358
Q10. 111, 128, 148, 170, 199, 230, 267
(a) 230
(b) 170
(c) 128
(d) 148
(e) 111
Solutions
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