Question 12
A mouse starts from the top left-most unit square marked with “I”, follows a route to form the word “IMAS2019” by moving from one square to another square that share a common side. How many different routes of eight squares are there?
|Column1|2|3|4|5|
|---|---|---|---|---|
|I|M|A|S||
|M|A|S|2|0|
|A|S|2|0|1|
|S|2|0|1|9|
||0|1|9||
|Column1|2|3|4|5|
|---|---|---|---|---|
|I|M|A|S||
|M|A|S|2|0|
|A|S|2|0|1|
|S|2|0|1|9|
||0|1|9||