What should be in a set of dominoes have 2 sets that gotten mixed?

You're describing a common domino dilemma! To figure out what should be in your mixed sets, let's break it down:

Standard Domino Sets:

* A standard double-six domino set has 28 dominoes.

* They range from double blank (0-0) to double six (6-6).

* Each number combination (like 2-4) appears once in both possible orders (4-2).

Mixing Two Sets:

* 56 Dominoes: If you've mixed two complete sets, you'll have 56 dominoes in total.

* Duplicates: Every domino from the original set will now be present twice.

Finding Out What You Have:

1. Identify Doubles: Look for all the doubles. In a standard set, you should have seven doubles, from double blank (0-0) to double six (6-6). Count how many of each double you have.

2. Count Other Combinations: For each non-double combination (like 2-4), count how many times it appears in your collection.

3. Compare to Standard Set: Compare your counts to the expected numbers in a standard set. If you have double the amount of each domino, you have two complete sets!

Important Note: Some domino sets come in different sizes (double-nine, double-twelve, etc.). If you suspect you might have a different kind of set, you'll need to adjust your counts accordingly.