Missing number: 28, 33, 31, ?, 34, 39

The missing number in 3, 8, 13, 24, 41, 70, ......

[Missing-number diagram: 3,4,2,3,1 / 8,5,3,2,1 / 5,6,4,5,1 / 8,6,5,4,2 / 7,8,4,5,?]

Select the missing number: 13, 35, 73, 215, 433, ?

Find the missing number: 15,36,28 / 10,20,24 / 7,9,11 / 12,25,?

Find the missing number in the 5×5 grid.