written 5.3 years ago by 
1) Test cases using Boundary value checking (BVC):
Since these is one variable, the total number of test cases will be 4n + 1 = 5
In this example, the set of minimum and maximum values is shown below:
Min value = 1
+
Min value = 2
Max value = 100

Max value = 99
Nominal value = 50  55
Using these values, test cases can be designed as shown below:
2) Test cases using robust testing:
Since there is one variable, the total number of test cases will be 6n + 1 = 7. The set of boundary values is shown below
Min value = 1
+
Min value = 2
Max value = 100

Max value = 99
Nominal value = 50  55
Using these values, test cases can be designed as shown below:
3) Test cases using worst  case testing:
Since there is one variable, the total number of test cases will be $5^n = 5$ Therefore, the number of test cases will be same as BVC