其它
There is a basket of peaches. Three students take turns to take peaches. Sana takes $2$ less than the half of peaches. Joann takes $2$ more than half of the remaining peaches. Now, there are $5$ peaches in the basket. How many peaches are there in the basket at beginning? 
Overseas Competition->Knowledge Point->Word Problem Modules
$$5+2=7$$  $7+7=14$  $14-2=12$  $12+12=24$ 