The seven sets of numbers below all have a certain logic that is the same in all seven numbers. See if you can determine the relationship and come up with the final digit of the last number.

a. 1 3 8 2 1

e. 2 5 1 1 6

b. 5 1 3 4 2

f. 4 4 4 0 3

c. 6 0 0 2 7

g. 7 0 3 1 ?

d. 9 2 0 4 0

The sum of each numbers of each set is 15 So the last digit in set g is 4