11. Look at this series: 1.5, 2.3, 3.1, 3.9, … What number should come next?

A. 4.2
B. 4.4
C. 4.7
D. 5.1

12. Look at this series: 14, 28, 20, 40, 32, 64, … What number should come next?

A. 52
B. 56
C. 96
D. 128

13. Look at this series: 2, 4, 6, 8, 10, … What number should come next?

A. 11
B. 12
C. 13
D. 14

14. Look at this series: 201, 202, 204, 207, … What number should come next?

A. 205
B. 208
C. 210
D. 211

15. Look at this series: 544, 509, 474, 439, … What number should come next?

A. 404
B. 414
C. 420
D. 445