366.

ա)A ∪ B = {1, 2, 3, 4, 5}
A ∩ B = {2, 3}

բ)C = {3, 12, 18, 26, 32}
A ∩ C = {3}
C ∩ B = {3}
A ∩ C = C ∩ B

367.
ա)N
բ)Z
գ)Q

368.
ա)-7 ∈ N — սխալ
բ)-4 ∉ N — ճիշտ
գ)1/3 ∈ Z — սխալ
դ)2,54 ∈ Q — ճիշտ

369.
ա)A = {17/3, 16/3, 14/3, 13/3, 11/3, 10/3, 8/3, 7/3, 5/3, 4/3, 2/3, 1/3}
բ)B = {40/3}

370.
ա)A = {11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47}
բ)B = {5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 37}
գ)C = {18, 29, 40, 51, 62, 73, 84, 95}
դ)A = {96, 90, 84, 78, 72, 66, 60, 54, 48, 42, 36, 30, 24, 18, 12, 6}