https://cssmcqs.com/in-a-row-of-trees-a-tree-is-7th-from-the-left-end-and-14th-from-the-right-end-how-many-trees-are-there-in-the-line/
In a row of trees, a tree is 7th from the left end and 14th from the right end. How many trees are there in the line?