While preparing for the Kangaroo Maths contest, Jack decided to solve one question from each odd numbered page in his collection of worksheets. He began on page $$15$$ and finished on page $$53$$. How many problems did Jack solve? 
选项为:A:$$19$$  B:$$20$$  C:$$27$$  D:$$38$$  E:$$53$$  请回答其中一个选项.