Số?
............ × 5 = 0
6 : ............ = 6
................... : 1 = 1
.....: 10 × 5 = 0
8 × ...... : 5 = 0
6 × 3 × ........= 0
10 × .......× 5 = 0
15 : 5 × 5 × ..... = 0
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