Number Series

1.		In the series: 9, 27, 31, 155, 161, 1127,... What number should come next?

1285

1135

1298

2244

2.		In the series: 625, 5, 125, 25, 25, _, 5,... What number should fill in the blank?

5

25

125

2.5

3.		Find the wrong term in the number series: 2, 5, 10, 17, 26, 37, 50, 64

5

17

37

64

4.		Find the wrong term in the number series: 3, 10, 27, 4, 16, 64, 5, 25, 125

25

64

10

3

5.		In the series: 2, 7, 27, 107, 427,... What number should come next?

807

1707

1307

1327

6.		In the series: 198, 194, 185, 169,... What number should come next?

127

161

136

144

7.		In the series: 3, 7, 23, 95,... What number should come next?

68

256

479

497

8.		In the series: 8, 28, 116, 584,... What number should come next?

3502

3504

3506

3508

9.		In the series: 1, 2, 3, 6, 9, 18, _, 54... What number should fill in the blank?

24

27

36

81

10.		Find the wrong term in the number series: 3, 4, 10, 32, 136, 685, 4116

10

32

685

4116