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105 is divisible by 5 because it ends in a 5.
105/5 = 21, so
5*21=105.
Since 21 = 3*7, and 5*3=15 and 5*7=35,
15*7 = 105 and
35*3 = 105 too.
Also, 105 * 1 = 105.
210 * 1/2 = 105,
315 * 1/3 = 105, etc.
Here I multiplied 105 by 2 or 3 and then multiplied back by 1/2 or 1/3.
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∙ 12y ago
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