WE CAN ASSIGN ONE OF THE INTEGERS 1, 2, 3, …, 7 (WITH NO REPETITIO...

8.

We can assign one of the integers 1, 2, 3, …, 7 (with no repetitions) to each

of the seven regions in the diagram so that numbers in adjacent regions

a

b

c

(having a common edge) differ by 2 or more.

d

e

f

g

How many different values are possible for region g?

Solution: