The answer to exercise marked [BB] can be found in the Back of the Book.
Carry out each of the indicated calculations, giving the answer mod n.
(a) [BB] 21,758, 623 + 17, 123,055,n =6
(b) (21,758,623)(17, 123,055), n = 6
(c) (17, 123)50, n = 6
(d) 104, 108, 1012, 1020, 1024, n=7
(e) [BB] 2, 22, 23, ‖, 210, n = 11
(f) 4, 42, 43, 44,45, 46, 47, 48,49, 410, n = 11
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