Solve {l}{1+2}{1+2+3}{1+2+3+4}{1+2+3+4+3}

$$\left. \begin{array} { l } { 1 + 2 } \\ { 1 + 2 + 3 } \\ { 1 + 2 + 3 + 4 } \\ { 1 + 2 + 3 + 4 + 3 } \end{array} \right.$$

Sort

$$3,\ 6,\ 10,\ 13$$

Solution Steps

Add 1 and 2 to get 3.

$$sort(3,1+2+3,1+2+3+4,1+2+3+4+3)$$

Add 1 and 2 to get 3.

$$sort(3,3+3,1+2+3+4,1+2+3+4+3)$$

Add 3 and 3 to get 6.

$$sort(3,6,1+2+3+4,1+2+3+4+3)$$

Add 1 and 2 to get 3.

$$sort(3,6,3+3+4,1+2+3+4+3)$$

Add 3 and 3 to get 6.

$$sort(3,6,6+4,1+2+3+4+3)$$

Add 6 and 4 to get 10.

$$sort(3,6,10,1+2+3+4+3)$$

Add 1 and 2 to get 3.

$$sort(3,6,10,3+3+4+3)$$

Add 3 and 3 to get 6.

$$sort(3,6,10,6+4+3)$$

Add 6 and 4 to get 10.

$$sort(3,6,10,10+3)$$

Add 10 and 3 to get 13.

$$sort(3,6,10,13)$$

The list values are already in order.

$$3,6,10,13$$

Evaluate

$$3,\ 6,\ 10,\ 13$$