Number Series Quiz for IBPS Clerk Pre 2018, Download Number Series PDF For Free

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Directions : What should come in place of Question mark (?) in the following Series.
1
907     907     891     ?     811     1067
» Explain it
A
The series is + (0)2, – (4)2, + (8)2, – (12)2, + (16)2, – (20)2

  Series Pattern     Series   
907 + (0)2 907  
907 – (4)2 891  
891 + (8)2 955
955 – (12)2 811  
811 + (16)2 1067  

Hence, option A is correct.

2
491      ?      419      386      355      326
» Explain it
D
  Series Pattern    Series  
491 491  
491 – 37 454
454 – 35 419  
419 – 33 386  
386 – 31 355  
355 – 29 326  

Hence, option D is correct.
3
10      20      41      84      ?      346
» Explain it
C
  Series Pattern     Series   
10 10  
10 × 2 + 0 20  
20 × 2 + 1 41  
41 × 2 + 2 84  
84 × 2 + 3 171
171 × 2 + 4 346  

Hence, option C is correct
4
26      52      208      1664      26624      ?
» Explain it
E
Series Pattern  Given Series  
26 26  
26 × 2 52  
52 × 4 208  
208 × 8 1664  
1664 × 16 26624  
26624 × 32 851968

Hencce, option E is correct.
 
5
15      8.5      10      ?      36.5      94.25
» Explain it
D
Series Pattern  Given Series  
15 15  
15 × 0.5 + 1 8.5  
8.5 × 1 + 1.5 10  
10 × 1.5 + 2 17
17 × 2 + 2.5 36.5  
36.5 × 2.5 + 3 94.25  

Hence, option D is correct