Gold Coins in the first bage = 1
Gold Coins in the second bag = 2
Gold Coins in the third bag = (2+2)= 4
Gold Coins in the fourth bag = (4+4)= 8
Gold Coins in the fifth bag = (8+8)= 16
Gold Coins in the sixth bag = (16+16)= 32
Gold Coins in the seventh bag = (32+32)= 64
Gold Coins in the eighth bag = (64+64)= 128
Gold Coins in the ninth bag = (128+128) 256
The total gold coins in the bag upto 9 =
1+2+4+8+16+32+64+128+256=511
The Gold coins in the tenth bag = 1000-511 = 489
For exaple,If 300 coins are requested he can give the bags such as 256+32+8+4. In this way any number of coins can be given.

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1 2 4 8 16 32 64 128 256 489

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