Solve {l}{+3+5+7+9+11+13+15}{+3+5+7+9+11+13+15+17+19+21+23+25}

$$\left. \begin{array} { l } { + 3 + 5 + 7 + 9 + 11 + 13 + 15 } \\ { + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 } \end{array} \right.$$

Evaluate

$$231$$

Solution Steps

Add 3 and 5 to get 8.

$$8+7+9+11+13+15+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 8 and 7 to get 15.

$$15+9+11+13+15+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 15 and 9 to get 24.

$$24+11+13+15+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 24 and 11 to get 35.

$$35+13+15+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 35 and 13 to get 48.

$$48+15+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 48 and 15 to get 63.

$$63+3+5+7+9+11+13+15+17+19+21+23+25$$

Add 63 and 3 to get 66.

$$66+5+7+9+11+13+15+17+19+21+23+25$$

Add 66 and 5 to get 71.

$$71+7+9+11+13+15+17+19+21+23+25$$

Add 71 and 7 to get 78.

$$78+9+11+13+15+17+19+21+23+25$$

Add 78 and 9 to get 87.

$$87+11+13+15+17+19+21+23+25$$

Add 87 and 11 to get 98.

$$98+13+15+17+19+21+23+25$$

Add 98 and 13 to get 111.

$$111+15+17+19+21+23+25$$

Add 111 and 15 to get 126.

$$126+17+19+21+23+25$$

Add 126 and 17 to get 143.

$$143+19+21+23+25$$

Add 143 and 19 to get 162.

$$162+21+23+25$$

Add 162 and 21 to get 183.

$$183+23+25$$

Add 183 and 23 to get 206.

$$206+25$$

Add 206 and 25 to get 231.

$$231$$

Factor

$$3\times 7\times 11$$