ตัวเลขมหัศจรรย์.... จำนวนที่ลงท้ายด้วย 199
901 |
* |
99 |
= |
89199 |
9001 |
* |
999 |
= |
8991999 |
90001 |
* |
9999 |
= |
899919999 |
900001 |
* |
99999 |
= |
89999199999 |
9000001 |
* |
999999 |
= |
8999991999999 |
90000001 |
* |
9999999 |
= |
899999919999999 |
900000001 |
* |
99999999 |
= |
89999999199999999 |
9000000001 |
* |
999999999 |
= |
8999999991999999999 |
90000000001 |
* |
9999999999 |
= |
899999999919999999999 |
900000000001 |
* |
99999999999 |
= |
89999999999199999999999 |
9000000000001 |
* |
999999999999 |
= |
8999999999991999999999999 |
90000000000001 |
* |
9999999999999 |
= |
899999999999919999999999999 |
ที่มา เด็กดีดอทคอม