it seemes that no1 can solve the question so i'll solve it since mora than one day has passed
SOL:
first, we get one coin from the first bottle, 2 coins from the second, three from the third, and so on....now we have 55 coins
1+2+3+4+5+6+7+8+9+10=55
each coins supposed to be 10gm so the weight of the 55 coins is 550
we'll put them on the balance and then check the weight, if the weight said 547 then there are three grams missing which means the bottle no3, if the weight is 545 then there are 5gms missing which means the bottle no5.....and so on
i hope u like it...i'll put another one soon
المفضلات