Answer:
What has a ring but no fingers?
Is always in front of you but cannot be seen?
When is 1500 plus 20 and 1600 minus 40 the same thing?
What can be seen but not touched?
Temporary evidence of where you've been strolling
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?