You join have to be in a game with them and while in the game you go to the toolbar at the top and click chat which brings up a chat bar in the bottom right hand part of screen. Narrow the people you want to chat by clicking on the tab "game" then find the person you want to befriend and there will be a downward arrow by their name. click this arrow and it will bring up a menu that will allow you to add them as a friend.
If no number is repeated then every number that appears once is a mode. They appear once, which is more often than any numbers that do not appear at all.
The root word of "reappeared" is "appear." "Re" is a prefix added to the root word "appear" to indicate a repeated action.
3 x 137 = 411
22*72 = 196
they appear to move.these are curved and twisted lines or repeated drawings of slanted lines.
2^2 = 4
Actually, the word "talk" is repeated once (for it to be repeated twice, it would have to appear three times). However, to answer your question, it is repeated to add emphasis and dramatic impact to the statement.
245 = 51 x 72
441 = 32 x 72
35 x 7 = 1701
22*52*43 = 4300
2 x 3 x 3 = 18