# Number series questions and answer

##### 1) 17, 18, 20, 23, 27, 32,______

a) 40

b) 39

c) 38

d) 37

Explanation:The difference between the terms increasing like
17+1=18,18+2=20,20+3=23…
hence it is 32+6=38.

##### 2) 1, 1, 1, 2, 3, 5, 7, 10,______

a) 12

b) 14

c) 15

d) 13

Explanation:Here the difference between the number 0, 0, 1, 1, 2, 2, 3, 3. So the answer is 13.

##### 3)11, 13, 17, 19, 23, 29,______

a) 33

b) 32

c) 31

d) 34

Explanation:The terms are consecutive primes,
so the next term of 29 is 31.

##### 5. 32.9, 32.7, 32.4, 32, 31.5,______

a) 30.5

b) 30.8

c) 30.4

d) 30.9

Explanation:The difference between terms decreasing by 0.2, 0.3, 0.4, 0.5, 0.6
such that 32.9-0.2=32.7, 32.7-0.3=32.4….
so 31.5-0.6=30.9.

##### 4. 8, 10, 13, 18, 25, 36,______

a) 48

b) 49

c) 50

d)51

Explanation:The difference between terms are arranged by adding prime number like
8+2=10,10+3=13,13+5=18,18+7=25…
so last number 36+13=49.

##### 6. 21, 26, 36, 41, 51, 56,______

a) 61

b) 66

c) 76

d) 70

Explanation:The terms are arranged by adding 5,10 secuancially
i.e 21+5=26,26+10=36…
so last term 56+10=66.

##### 7. 5, 8, 10, 11, 14, 10, 17, 20,______

a) 22

b) 23

c) 13

d) 10

Explanation:Here difference between 5 and 8 is "3".Then next term is 10.Then difference between 11 and 14 is then term is "3", and next term is 10.So in this order the answer is 10.

##### 8. 95, 85, 76, 68, 61, 55,______

a) 48

b) 49

c) 50

d) 51

Explanation:The difference between the terms are decreasing by 10,9,8,7,6,5…
like 95-10=85,85-9=76..
so last term 55-5=50.

##### 9. 21, 22, 26, 35, 51,______

a) 76

b) 77

c) 58

d) 82

Explanation:The difference between the terms are arranged by 12,22,32,42....
so 21+1=22,22+4=26…last term 51+25=76.

a) 14.6

b) 14.4

c) 14.7

d) 14.5