Quantitative Aptitude: Number Series Set 101

Directions(1-5): Find the missing term '?' of the following series.

1. 3, 4, 9, 28, ?, 566
   124
   100
   115
   127
   113
   Option E
   *1+1
   *2+1
   *3+1
   *4+1
   *5+1
   ? = 113
   
   
    



2. 418, 208, 102, 48, ?, 5
   10
   15
   25
   20
   30
   Option D
   *2+2
   *2+4
   *2+6
   *2+8
   *2+10
   ? = 20
   
   
    



3. 180, 191, 193, 203, 206, ?
   200
   215
   226
   212
   202
   Option B
   +11,+2,+10,+3,+9
   ? = 215
   
   
   
    



4. 153, 155, 160, 170, 187, ?
   213
   200
   218
   225
   220
   Option A
   Double difference
   ? = 213
   
   
    



5. 3, 1.5, 1.5, 3, 12, 96, ?
   1551
   1536
   1524
   1550
   1500
   Option B
   *0.5,*1,*2,*4, *8, *16
   ? = 1536
   
   
    
Directions(6-10): Find the wrong number of the following series.


6. 957, 597, 360, 237, 123, 110, 9
   597
   123
   110
   9
   360
   Option C
   Wrong number = 110
   957 – 597 = 360
   597 – 360 = 237
   360 – 237 = 123
   237 – 123 = 114
   123 – 114 = 9
   There should be 114 in place of 110.
   
   
    



7. 19, 380, 669, 840, 959, 1008, 1033
   19
   380
   840
   959
   1033
   Option
   Wrong number = 840
   19 + (19)² = 19 + 361 = 380
   380 + (17)² = 380 + 289 = 669
   669 + (13)² = 669 + 169 = 838
   838 + (11)² = 838 + 121 = 959
   959 + (7)² = 959 + 49 = 1008
   1008 + (5)² = 1008 + 25 = 1033
   There should be 838 in place of 840.
   
   
    



8. 1487, 1170, 928, 803, 739, 712, 704
   1170
   739
   704
   803
   928
   Option A
   Wrong number = 1170
   1487 – (7)³ = 1487 – 343 = 1144
   1144 – (6)³ = 1144 – 216 = 928
   928 – (5)³ = 928 – 125 = 803
   803 – (4)³ = 803 – 64 = 739
   739 – (3)³ = 739 – 27 = 712
   712 – (2)³ = 712 – 8 = 704
   There should be 1144 in place of 1170.
   
   
    



9. 6, 18, 36, 144, 720, 4320, 30240
   720
   6
   4320
   18
   36
   Option D
   Wrong number = 18
   6 × 2 = 12
   12 × 3 = 36
   36 × 4 = 144
   144 × 5 = 720
   720 × 6 = 4320
   4320 × 7 = 30240
   There should be 12 in place of 18.
   
   
    



10. 1764, 1681, 1597, 1521, 1444, 1369, 1296
    1764
    1444
    1597
    1369
    1296
    Option C
    Wrong number = 1597
    1764 – 83 = 1681
    1681 – 81 = 1600
    1600 – 79 = 1521
    1521 – 77 = 1444
    1444 – 75 = 1369
    1369 – 73 = 1296
    There should be 1600 in place of 1597.