a) 1743=2000,700, 40, 3
10000=10000
7401=7000,400, 1
9980=10000, 1000, 100
6255 =6000, 300, 60, 5
2389=2000, 400, 90,9
1147 =1000,100,50,7
2943=3000,900,40,3
7340=7000,300,40,
3333=3000,300,30,3
b) 10000 >9980
7340 <9980
7340 <10000
c) 1147,1743, 2389, 2943, 3333, 6255, 7401, 7340, 9980, 10000.
d) 7401.
