帮我讲解这个问题---**Question 12:** **Question Stem:** 12. 把 23 支铅笔任意放进 5 个文具盒里，至少有一个文具盒里至少放进了____支铅笔. **Options:** (None) **Other Relevant Text:** (None) **Mathematical Formulas/Chemical Equations:** (None) **Table Content:** (None) **Chart/Diagram Description:** * **Type:** 3D illustrative diagram. * **Main Elements:** * A rectangular prism box (likely representing a pencil case). The box is shown transparently with dashed lines indicating hidden edges. * Two objects inside the box, standing upright on the bottom surface. * The object on the left is a cylinder, representing a pencil. * The object on the right is a cone with a cylindrical base, also representing a pencil. * The top surfaces of the objects are slightly below the top edge of the box. * The diagram appears to be an illustration of pencils in a pencil case and is not directly related to the mathematical problem in question 12.