1. 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
2. 137- nr.prim
263-nr.prim
403-nr.compus
1001-nr.compus
2027-nr.prim
2029-nr.prim
2167-nr.compus
3. 6=3+3
14=7+7
26=13+13
42=13+29
108=47+61
4. 15=5+5+5
20=13+5+2
21=11+7+2
26=17+4+5
5.?
6.?
7.?
8. 2xx
×€{2,3,5,7,11,13,17,19,23,29....97}(sper sa fie bine!)
9. □+□=61
59+2=61
59×2=118
10. 4× și 7x sa fie nr prime
4x= x€{1,,3,7}
7x€{1,3,9}(sper xa e bn)
11.?
