Sometimes we need to check our Tomcat version
It’s very simple, you should to find in the bin folder and run version.bat (Windows) / (Linux)

And see:

Using CATALINA_BASE: "C:\tomcat\apache-tomcat-8.0.5-1"
Using CATALINA_HOME: "C:\tomcat\apache-tomcat-8.0.5-1"
Using CATALINA_TMPDIR: "C:\tomcat\apache-tomcat-8.0.5-1\temp"
Using JRE_HOME: "C:\Program Files\Java\jdk1.8.0\jre"
Using CLASSPATH: "C:\tomcat\apache-tomcat-8.0.5-1\bin\bootstrap.jar;C:\tom
Server version: Apache Tomcat/8.0.5
Server built: Mar 24 2014 05:29:50
Server number:
OS Name: Windows 7
OS Version: 6.1
Architecture: amd64
JVM Version: 1.8.0-b132
JVM Vendor: Oracle Corporation