# Number Series Questions for SSC CGL 2017

## Number Series Questions with Solution

Direction Q1- Q10. In each of the following number series questions, one number is wrong in the series. Find out the wrong one.

Q1.  49,   56,   64,   71,   81,   90,   100,   110
A. 56
B. 64
C. 71
D. 81
E. 90

Q2.  9,    13,    21,   37,   69,   132,   261
A. 21
B. 37
C. 69
D. 132
E. 261

Q3. 9,   15,   24,   34,    51,    69,    90
A. 15
B. 24
C. 34
D. 51
E. 69

Q4. 1,   3,   8,   19,   42,   88,   184
A. 3
B. 8
C. 19
D. 42
E. 88

Q5. 3,   9,   36,   72,   216,   864,   1728,    3468
A. 3468
B. 1728
C. 864
D. 216
E. 42

Q6. 2,   4,   8,   16,   48,   64,   128,    256
A. 4
B. 8
C. 16
D. 48
E. 128

Q7. 5,   8,   10,    12,   15,   18,   20,   23
A. 8
B. 12
C. 15
D. 18
E. 20

Q8. 2,   5,   11,   23,    95,   191,    383
A. 5
B. 11
C. 23
D. 48
E. 95

Q9. 3,   10,   36,   180,   1080,   7560,    60480
A. 3
B. 10
C. 21
D. 64
E. 129

Q10. 144,   121,   100,   81,   64,   49,   35,   25
A. 121
B. 100
C. 81
D. 64
E. 35

Answer 1. C - It followes Terms at odd places are 7 square,  8 square,  9 square ..... and terms at even places are 56, 72, 90 .... i.e. differences of 16, 18, 20 ....
Answer 2. D - It followes +4, +8, +16, +32 ...... Hence the correct one is D.
Answer 3. C - In place of 34 it should be replaced by 36.  Basically it followes this rules - +6, +9, +12, +15 ....
Answer 4. E - Number 88 is wrong. It should be replaced by 89
Answer 5. A - It followes this rules x3, x4, x2, x3, x4, x2, x3 Hence 3468 is wrong and should be replaced by 5185.
Answer 6. D - It follows a simple rules x2.
Answer 7. B - If followes +3, +2, +3, +2 .... like wise.
Answer 8. D - It followes +3, +6, +12, +24, +48 .....
Answer 9. B - It follows x3, x4, x5, x6 .....