1 Your oranges should be washed before peeling or cutting. Wet each orange with water, rub its surface, rinse it with running water and dry it with a clean towel.  Washing oranges in a sink filled with water is not recommended since the standing water can spread contamination from one orange to another. The use of soap or detergent is not recommended because the fruit can absorb detergent residues. Consider a dip in clear white vinegar as an added precaution.
The most common domino sets commercially available are double six (with 28 tiles) and double nine (with 55 tiles). Larger sets exist and are popular for games involving several players or for players looking for long domino games. The number of tiles in a set has the formula 12(n + 1)(n + 2) for a double-n set.
18Ã18 dominoes (double eighteen) The double six dominoes has 28 pieces, in which there are 7 doubles and 21 single pieces will take place. A standard double six dominoes has 168 dot in it. Typically, these numbers will vary for each and it could be calculated with the following formula. Consider the highest number on the dominoes as .