310 of the runners in a marathon are Japanese. 47 of the remaining runners are Indians, 13 of the rest of the runners are Italians, 55 are Chinese and 35 are Koreans. How many more Japanese than Koreans runners are there?
| Japanese |
Remaining runners |
| 3 u |
7 u |
| |
Indians |
Rest of the runners |
| |
4 u |
3 u |
| |
|
Italians |
Chinese |
Koreans |
| |
|
1 u |
2 u |
| |
|
|
55 |
35 |
Total number of Chinese and Koreans
= 55 + 35
= 90
2 u = 90
1 u = 90 ÷ 2 = 45
Number of more Japanese runners than Koreans runners
= 3 u - 35
= 3 x 45 - 35
= 135 - 35
= 100
Answer(s): 100
