4. C When we apply the different orders of actions to a start number of 3 , we obtain the following sequences: $3 \rightarrow 9 \rightarrow 11 \rightarrow 10,3 \rightarrow 9 \rightarrow 8 \rightarrow 10,3 \rightarrow 5 \rightarrow 15 \rightarrow 14,3 \rightarrow 5 \rightarrow 4$ $\rightarrow 12$ and $3 \rightarrow 2 \rightarrow 6 \rightarrow 8$. Hence the required sequence is the one given in $\mathrm{C}$ and is AMS.
4. Milly likes to multiply by 3 , Abby likes to add 2 and Sam likes to subtract 1 . In what order should they perform their favourite actions to start with 3 and end with 14 ?
A MAS
B MSA
C AMS
D ASM
E SMA