Number series for SBI clerk

1.    64 , 32 , 16 , 8 , ____

A. 2
B. 1
C. 4
D. 6

2.     10000 , 2000 , 400 , 80 , 16 , 3.2 , ___


A. 0.38
B. 0.45
C. 0.64
D. 0.54

3.    17 , 52 ,  158 , 477 ,  ___ ,  4310


A. 1433
B. 1432
C. 1434
D. 1435

4.   11 , 9 , 15 , 41 , 159 , ____


A. 785
B. 789
C. 797
D. 769
E. 771

5.  31 , 44 , 65 , ___ , 139 , 196


A. 75
B. 85
C. 89
D. 96
E. 56

Answer :
1. C
2. C
3. D
4. B
5. D

Solution :
1. Every number divided by 2 then final value get 4 .

2. The pattern is :
10000 ÷ 5 = 2000
2000  ÷ 5  = 400
400 ÷ 5 = 80
80 ÷ 5 = 16
16 ÷ 5 = 3.2
3.2 ÷ 5 = 0.64

3. The pattern is :
17 × 3 + 1 = 52
52 × 3 + 2 = 158
158 × 3 + 3 = 477
477 × 3 + 4 = 1435
1435 × 3 + 5 = 4310

4. The pattern is :
11 × 1 - 2 = 9
9 × 2  - 3  = 15
15 × 3 - 4 = 41
41× 4 - 5 = 159
159 × 5 - 6 = 789

5. The pattern is :
31 + (  4^2 - 3 )  = 44
44 + ( 5^2 - 4 )   = 65
65 + ( 6^2 - 5 )   = 96
96 + ( 7^2 - 6 )   = 139
139 + ( 8^2 - 7 ) = 196





























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