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