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

11

12

13

14

Correct Answer : B

Look at this series: 40, 40, 47, 47, 54,...What number should come next?

Look at this series: 58, 52, 46, 40, 34,...What number should come next?

Which one of the following cannot be the ratio of angles in a right-angled triangle