313 of the runners in a marathon are Mongolians. 310 of the remaining runners are Egyptians, 17 of the rest of the runners are Chinese, 51 are Vietnamese and 15 are Japanese. How many more Mongolians than Japanese runners are there?
| Mongolians |
Remaining runners |
| 3 u |
10 u |
| |
Egyptians |
Rest of the runners |
| |
3 u |
7 u |
| |
|
Chinese |
Vietnamese |
Japanese |
| |
|
1 u |
6 u |
| |
|
|
51 |
15 |
Total number of Vietnamese and Japanese
= 51 + 15
= 66
6 u = 66
1 u = 66 ÷ 6 = 11
Number of more Mongolians runners than Japanese runners
= 3 u - 15
= 3 x 11 - 15
= 33 - 15
= 18
Answer(s): 18
