What is the difference between the maximum and minimum number of safe cells?
Explanation:
Maximum number of safe cells will be when the mine is placed at one of the corners.
If mine is placed at A8, cells marked with × denote unsafe cells.
∴ Number of unsafe cells = 22
∴ Number of safe cells = 64 – 22 = 42.
Minimum number of safe cells will be when the mine is placed in the middle.
If mine is placed at D4, cells marked with × denote unsafe cells.
∴ Number of unsafe cells = 28
∴ Number of safe cells = 64 – 28 = 36.
⇒ Difference between maximum and minimum safe cells = 42 – 36 = 6.
Hence, option (b).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.