Here's why:
* Different Sets, Different Sizes: Encyclopedias come in many different versions. Some are very short and concise, while others are massive and detailed.
* Number of Volumes: Encyclopedias are often published in multiple volumes (like 20 volumes).
* Edition: Even the same encyclopedia can have different page counts depending on the edition.
To figure out how many pages are in a particular set of encyclopedias, you'd need to look at the specific set and count the pages in each volume.