1, assuming that the unit of football is 1, the number ratio of basketball to football is 2:3, so basketball is 2/3, and the number ratio of football to table tennis is 4: 5, so football is 1 and 1/4, so the total is1+2.

Basketball: 24X2/3= 16, table tennis: 24X5/4=30.

2. Because the ratio of read pages to unread pages is 1:3, read pages account for 1/4 and unread pages account for 3/4. If you read 24 more pages, the ratio of the number of pages read to the number of pages not read is 1:2, so the number of pages read is 1/3. Two-thirds of unread accounts. So the number of pages in this book is:12 ÷ (1/3-1/4) =144 pages.

3. The length is 56/2x4/(4+3) = 16m and the width is 56/2x3/(4+3) = 12m, so the area is:16x12 =12.