You are troubled by not knowing what to play when you drinking?
This is a free online web game Bulls and Cows(1A2B).
You don't need to worry about download too many apps it's work on web and you use it anytime.
1.The system will set 4 numbers for each question and the numbers do not repeat.
2.You need to answer 4 numbers then the system will remind you XAYB.
If the matching digits are in their right positions, they are "bulls(A)", if in different positions, they are "cows(B)".