A flat card made of cardboard or non-reusable paper which contains 25 squares arranged in
five vertical and five horizontal rows. The letters B, I, N, G, O are pre-printed above
the five vertical columns, with one letter appearing above each column. The center space
is marked "free." The printed numbers on the card correspond to the following
arrangement: 1 to 15 in the B column; 16 to 30 in the I column; 31 to 45 in the N column;
46 to 60 in the G column and 61 to 75 in the O column. |
