SIEVE-CARDS-4

BACK to PROCEDURE All 5-multiples sieved out (missing below). Then child's bottle-caps show 7 not a Table-Number, but a Row-Number.
* * * | * * * * * | * * * * * * * | WE ONLY TEST FOR ROWS OF * * * | * * | GNOMONS 3 OR 5. BUT WE CAN'T BUILD 7 * | AS A TABLE OF 3'S OR 5'S. SO 7 IS A ROW-NUMBER.
However, GNOMON 7 builds TABLE-NUMBERS: Each 7-multiple is a Table-Number, to be SIEVED OUT! Note!! THE FIRST MULTIPLE OF 7 IS ITS SQUARE: 7 X 7.

2 3 5 7 11 13

17 19 23 29

31 37 41 43

47 49 53

59 61 67 71

73 75 77 79 83

89 91 93 97

101 103 107 109 113

119 121 127

129 131 133 137 139

143 149 151

157 161 163 167 169

173 179 181

187 191 193 197

199 203 209 211

BACK to PROCEDURE

2	3	5	7		11	13
	17	19		23			29
	31			37		41	43
		47	49		53
	59	61			67		71
	73	75	77	79		83
		89	91	93		97
	101	103		107	109		113
			119	121			127
	129	131	133		137	139
	143			149	151
	157		161	163		167	169
		173			179	181
		187		191	193		197
	199		203			209	211