# 10 Most Important Questions of Number Series for IBPS Clerk 2017

Q1. 35, 19, 11, 7, ?
Options:
a. 5
b. 6
c. 7
d. 8
e. 9
Q2. 9, 20, 42, ?, 174
Options:
a. 95
b. 86
c. 77
d. 88
e. 99
Q3. 7, 49, 343, ?
Options:
a. 5021
b. 6098
c. 1907
d. 2401
e. 1029
Q4. 289, 169, 121, 49, ?, 9
Options:
a. 25
b. 36
c. 17
d. 8
e. 19

Q5. 24, 32, 40, 48, ?
Options:
a. 50
b. 52
c. 71
d. 48
e. 59
Q6. 0.1, 0.01, 0.001, 0.0001, ?
Options:
a. 0.0000000.1
b. 0.0001
c. 0.001
d. 0.00001
e. 0.0000001
Q7. 5, 9, 17, 33, 65, ?
Options:
a. 125
b. 126
c. 127
d. 128
e. 129
Q8. 22, 44, 88, ?
Options:
a. 175
b. 176
c. 177
d. 178
e. 179
Q9. 5, 25, 150, 1050, ?
Options:
a. 8574
b. 8400
c. 8700
d. 8987
e. 9000
Q10. 9, 99, 999, 9999, ?
Options:
a. 9999999999
b. 999999
c. 99999
d. 9999999
e. 999999999

Shortcut Explanations:
Solution of Q1:
Logic is: ✕0.5 + 1.5
Solution of Q2:
Logic is: ✕2 + 2
Solution of Q3:
Logic is: ✕7
Solution of Q4:
Logic is: Square of prime numbers in decreasing order.
Solution of Q5:
Logic is: +8
Solution of Q6: