213 of the runners in a marathon are Koreans. 411 of the remaining runners are Italians, 37 of the rest of the runners are Mongolians, 54 are Egyptians and 30 are Chinese. How many more Koreans than Chinese runners are there?
| Koreans |
Remaining runners |
| 2 u |
11 u |
| |
Italians |
Rest of the runners |
| |
4 u |
7 u |
| |
|
Mongolians |
Egyptians |
Chinese |
| |
|
3 u |
4 u |
| |
|
|
54 |
30 |
Total number of Egyptians and Chinese
= 54 + 30
= 84
4 u = 84
1 u = 84 ÷ 4 = 21
Number of more Koreans runners than Chinese runners
= 2 u - 30
= 2 x 21 - 30
= 42 - 30
= 12
Answer(s): 12
