Number Series - General Questions

Look at this series: 35, 39, 43, 47, 51, 55, … What number should come next?

Look at this series: 57, 74, 91, 108, 125, 142, … What number should come next?

Look at this series: 4, 6, 10, 16, 24, 34, … What number should come next?

Look at this series: 121, 117, 113, 109, 105, 101, … What number should come next?

Look at this series: 10, 73, 13, 68, 16, 63, … What number should come next?