• #### 8. 1,9,17,33,49,73, ?

1. 93
2. 95
3. 97
4. 99

Explanation:

Pattern for the given series is, +8, +8, +16, +16, +24

So next will be +24, 73+24 = 97

• #### 9. 2,5,9,?,20,27, what will replace the question mark ?

1. 13
2. 14
3. 15
4. 16

Explanation:

Pattern is +3,+4,..,..,+7, so +5 and +6 will be in the blanks

Question mark will be replaced by 9+5 = 14

• #### 10. 21,25,33,49,81, ?

1. 140
2. 145
3. 147
4. 159

Explanation:

Pattern is, +4, +8, +16, +32, so next will be +64
81+64 = 145

• #### 11. 5,9,17,29,45, ?

1. 50
2. 60
3. 65
4. 70

Explanation:

In this series the pattern is +4, +8, +12, +16, so next will be +20

Term which will replace the question mark in this series will be 45+20 = 65

• #### 12. 1,6,15,(...),45,66,91

1. 26
2. 28
3. 29
4. 34

Explanation:

Pattern in the series is, +5, +9, .., .., +21, +25
So 4 is getting increased at every term addition.
Missing term in the series will be 15+(9+4)
= 15+13 = 28

• #### 13. Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?

1. 25
2. 26
3. 27
4. 28

Explanation:

Please look carefully at the series, its pattern is,
-1, +2, -1, +2, -1, so next will be +2
23+2 = 25

1. 17
2. 12
3. 9
4. 13