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April 25, 2015

Homework Help: number theoRY!!!

Posted by please..anyone help!! on Monday, March 18, 2013 at 3:11am.

How many integers appear in both of the following arithmetic progressions:
A1: 2, 9, 16,.....2+(1000-1)*7
A2: 3, 12, 21,.....3+(1000-1)*9

Since 2 appears in A1 but not in A2, it does not appear in both of the arithmetic progressions.

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