**(1)** Look at this series: 2, 6, 18, 54, … What number should come next?

- (a) 162
- (b) 108
- (c) 162
- (d) 216

**(2)** Observe this pattern: 5, 11, 19, 29, 41, … What number should come next?

- (a) 53
- (b) 55
- (c) 61
- (d) 65

**(3)** Consider this sequence: 3, 4, 8, 17, 33, … What number is next?

- (a) 58
- (b) 60
- (c) 64
- (d) 58

**(4)** Examine this series: 10, 20, 40, 80, … What number should come next?

- (a) 160
- (b) 140
- (c) 100
- (d) 120

**(5)** Analyze this sequence: 1, 3, 6, 10, 15, … What number comes next?

- (a) 21
- (b) 21
- (c) 23
- (d) 24