Quantitative Aptitude: Number Series Set 127

Find the wrong term:-

1. 289.., 292.., 297.., 306.., 322
   289
   292
   297
   306
   322
   Option E
   289 + (21 + 1) = 292
   292 + (22 + 1) = 297
   297 + (23 + 1) = 306
   306 + (24 + 1) = 323
   
   
    



2. 21.., 10.., 11.., 16.5.., 33..,
   21
   10
   11
   16.5
   32
   Option E
   21 * 0.5 – 0.5 = 10
   10 * 1 + 1 = 11
   11 * 1.5 – 1.5 = 16.5
   16.5 * 2 + 2 = 32
   
   
    



3. 225.., 223..., 111..., 36..., 8
   225
   223
   111
   36
   8
   Option B
   (225 – 1) / 1 = 224,
   (224 – 2) / 2 = 111,
   (111 – 3) / 3 = 36,
   (36 – 4) / 4 = 8
   
   
    



4. 1..., 2..., 8..., 32..., 148...,
   1
   2
   8
   32
   148
   Option D
   1 * 1 + 12 = 2
   2 * 2 + 22 = 8
   8 * 3 + 32 = 33
   33 * 4 + 42 = 148
   
   
    



5. 
   27..., 55..., 114..., 227..., 458
   27
   55
   114
   227
   458
   Option C
   27 * 2 + 1 = 55
   55 * 2 + 2 = 112
   112 * 2 + 3 = 227
   227 * 2 + 4 = 458
   
   
    


Find the missing numbers:-
6. 1024.., 64.., 512.., 128.., 256.., ?
   234
   256
   276
   244
   250
   Option B
   1024 ÷ 16 = 64
   64 * 8 = 512
   512 ÷ 4 = 128
   128 * 2 = 256
   256 ÷ 1 = 256
   
   
    



7. 578.., 589.., 611..., 655.., ?.., 919
   657
   743
   890
   790
   888
   Option B
   578.., 589.., 611..., 655.., 743.., 919
   11 22 44 88 176
   11 22 44 88
   
    



8. 13..., 156..., 297.., 436.., 573.., 708.., ?
   870
   841
   887
   860
   790
   Option B
   13 + 143 = 156
   156 + 141 = 297
   297 + 139 = 436
   436 + 137 = 573
   573 + 135 = 708
   708 + 133 = 841
   
   
    



9. 9360.., 9360.., 4680.., 1560.., 390.., 78.., ?
   12
   13
   14
   15
   16
   Option B
   9360 / 1 = 9360
   9360 / 2 = 4680
   4680 / 3 = 1560
   1560 / 4 = 390
   390 / 5 = 78
   78 / 6 = 13
   
   
    



10. 23..., 34.5..., 69..., 172.5..., 517.5..., 1811.25..., ?
    3456
    7245
    3467
    7690
    1128
    Option B
    23 * 1.5 = 34.5
    34.5 * 2 = 69
    69 * 2.5 = 172.5
    172.5 * 3 = 517.5
    517.5 * 3.5 = 1811.25
    1811.25 * 4 = 7245