Question 7: Find \(U\left( 6 \right) \)

A. \(U\left( 6 \right) = \left\{ {1;2;3;6;12} \right\}\)

B. \(U\left( 6 \right) = \left\{ {1;2;3;6} \right\}\)

C. \(U\left( 6 \right) = \left\{ {1;2;3;5;6} \right\}\)

D. \(U\left( 6 \right) = \left\{ {2;3;6} \right\}\)

From 1 to 6, we see that 6 is divisible by 1, 2, 3, 6 so:

\(U\left( 6 \right) = \left\{ {1;2;3;6} \right\}\)

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