A moment ago, there were a total of 1824 spectators at a table tennis match. 217 of the male spectators and 492 of the female spectators left the stadium. Now there are four times as many male as female spectators left in the stadium. How many more male than female spectators are there in the stadium now?
Number of spectators left in the stadium
= 1824 - 217 - 492
= 1115

Number of female spectators in the end = 1 u
Number of male spectators in the end = 4 u
Total number of spectators in the end = 1 u + 4 u = 5 u

5 u = 1115
1 u = 1115 ÷ 5 = 223

Number of female spectators
= 1 u 
= 223

Number of male spectators
= 4 u
= 4 x 223
= 892

Number of male spectators more than the female spectators
= 892 - 223
= 669

Answer(s): 669