2 * 2 = 4 2 * 3 = 6 2 * 5 = 10 2 * 7 = 14 3 * 3 = 9 3 * 5 = 15 3 * 7 =21
5 * 5 = 25 5 * 7 = 35 7 * 7 = 49
Следовательно, таких чисел 10: 4, 6, 9, 10, 14, 15, 21, 25, 35, 49.
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2 * 2 = 4 2 * 3 = 6 2 * 5 = 10 2 * 7 = 14 3 * 3 = 9 3 * 5 = 15 3 * 7 =21
5 * 5 = 25 5 * 7 = 35 7 * 7 = 49
Следовательно, таких чисел 10: 4, 6, 9, 10, 14, 15, 21, 25, 35, 49.