How can i make random.Range() generate always even numbers?

So im trying to make a little minigame where you get random numbers and have to guess the answer , But its supposed to help youngers to learn math . So i wont let the program generate number such as 7/3 because they wont know how to answer , i want the digits to be always even. How can i do it?

 

half the range and times by 2?

 

this is random digit \/
digit2 = Random.Range(1, 5); // what you mean?

 

Code (CSharp):

1. int max = 1234;
2. int r = Random.Range(0, max);
3. if (r % 2 != 0)
4.     r += 1;

 

random numbers between 1 and 10 => Random.Range(1, 11)
random even numbers between 1 and 10 => Random.Range(1, 6) * 2

 

Thanks , if you have time , i have one little question , for now ive something like this and i want the signs to be randomly generated i mean ( + , - , * , / ) they are randomly choosen and they affect the answer . I dont know how to make them random and how to tell the script to show the answer depending on the sign that was generated

 

I'd probably go with an enum for that.
https://unity3d.com/learn/tutorials/modules/beginner/scripting/enumerations

http://answers.unity3d.com/questions/56429/enum-choose-random-.html
handy generic function in that thread for pulling off a random enum.


You can then use a "switch statement" based on the enum to perform the correct calculation for the expected result the player should be inputting
https://msdn.microsoft.com/en-GB/library/06tc147t.aspx

 

How would it look like then? i never used an enum im noob :/

Code (CSharp):

1. Enum mySigns{
2. " + " =1
3. " - "=2
4. " * "=3
5. " / "=4
6. mySigns choice = GetRandomEnum<MySignsEnum>();
7. }

i dont know how should i give them a value to make it work like i want :C