you use 8
Every set of dominoes includes all possible combinations of two numbers, from zero (blank) up to the highest number of pips in the set (for example, 12 in a double-12 set), as well as a double for...
i think 68 I believe there are 98 plus 2 blanks
100 Scrabble tile letters: A-9 B-2 C-2 D-4 E-12 F-2 G-3 H-2 I-9 J-1 K-1 L-4 M-2 N-6 O-8 P-2 Q-1 R-6 S-4 T-6 U-4 V-2 W-2 X-1 Y-2 Z-1 Blank-2
There are two (2) blank tiles in standard Scrabble with an assigned value of zero points.