Answer:
5146
Step-by-step explanation:
There are 5 nickels in a quarter,
5 - 1 = 4,
There are 4 sides in a quadrilateral,
and 6 would make the digital root 7.
5146 -> 5 + 1 + 4 + 6 = 16
16 -> 1 + 6 = 7
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