智力测试

There were 12 runners in a marathon. They lined up as follows. What number should the 12th runner have?

【正确答案】

【答案解析】

8×8=64 Reversed=46
5×5=25 Reversed=52
4×4=16 Reversed=61
7×7=49 Reversed=94
6×6=36 Reversed=63
9×9=81 Reversed=18