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1.1  1, 2, 3, 7, 9, 13, 14, 15, 16, 17, 20, 23  Solutions 
1.2  1, 2, 6, 11, 12, 13, 15  Solutions 
1.3  121, 23, 28  Solutions 
2.1  1, 8, 1320, 25, 26, 28, 32, 34  Solutions 
2.2  19, 11, 12, 21, 23, 30, 31  Solutions 
2.3  1, 3, 4, 8, 9, 15, 21  Solutions 
2.5  19, 15, 26  Solutions 
2.6  114, 1822, 2530  Solutions 
2.7  1, 3, 4, 5, 7, 11, 13  Solutions 
3.1  117 odd, 20, 21, 2943 odd  Solutions 
3.2  114, 17, 18, 2126  Solutions 
3.3  110, 1518, 2125, 28  Solutions 
3.4  16, 721 odd, 24, 28, 29, 33, 35, 36, 37  Solutions 
3.5  113 odd, 16, 20, 2329 odd  Solutions 
4.1  710, 11, 13, 15, 2124, 27, 28  Solutions 
4.2  110, 1123 odd, 2935 odd  Solutions 
3.6  117 odd, 1925 odd (a) only  Solutions 
3.7  119 odd  Solutions 
4.3  117 odd  Solutions 
4.4  111 odd, 15  Solutions 
3.8  1, 3, 5, 7, 11, 12, 16, 24  Solutions 
5.1  116, 1928  Solutions 
5.2  27, 914, 16, 21  Solutions 
5.3  1, 510, 12, 13, 15, 16, 18, 21  Solutions 
5.4  118, 20  Solutions 
5.5  115 odd, 18, 19  Solutions 
5.6  19 odd, 11  Solutions 
5.7  115 odd  Solutions 
5.8  1, 3, 5, 6  Not yet! 
6.1  15, 710, 1524  Solutions 
6.2  110, 1123 odd, 25, 26  Solutions 
6.3  115, 17, 2127, 29, 31, 32  Solutions 
6.4  11, 3, 5, 6, 7, 11, 12, 13, 14, 15, 16  Not yet! 
10.1  113  Solutions 
10.2  18, 12, 13, 15, 18, 19, 20  Solutions 
Last updated 8/13/14