Number patterns II

This task is about finishing number patterns.
Finish each pattern by writing the missing numbers in the boxes.

Question 1Change answer

a)  3, 6, 9, 12, , 

Question 1Change answer

b)  42, 40, 38, 36, , 

Question 1Change answer

c)  4, 10, 16, 22, , 

Question 1Change answer

d)  2, 13, 24, 35, , 

Question 1Change answer

e)  81, 72, 63, 54, ,