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Answer:
If the discs were measured to the nearest milimetre, it might be possible, that they are actually 1.64cm wide instead of only 1.64cm as shown.
Therefore the box would fill up much quicker and there will not be enough space.
Step-by-step explanation:
1.6cm * 16 discs = 25.6cm (would fit)
1.64cm * 16 discs = 26.24cm (would not fit)