Sum of the five weights = 1124 units
so average = 1124/5 = 224.8 units
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215 could be round up to 216 or down to 200.
211, since 211 is the only prime number between 200 and 215.
210
200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 224, 225, 226, 228, 230
As written, 215 5 + 2 x 10 = 25