The set {1, 2, 3, 5, 7, 8, 9} under multiplication modulo 10 is not a group.…
GATE · 2006 · CS
The set {1, 2, 3, 5, 7, 8, 9} under multiplication modulo 10 is not a group. Given below are four possible reasons. Which one of them is false?
- A.
It is not closed
- B.
2 does not have an inverse
- C.
3 does not have an inverse
- D.
8 does not have an inverse
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