Just something to consider: The mark of the beast is on the right hand or forehead. Interpretation is made for this by reading the rest of the bible. One finds in
Deut 6:5-8 where the law of God was to be so endearing to the people that it was said to be put in the heart, soul and might of the people, represented by the forehead (soul) and hand (might). The mark of the beast is SATAN'S ANSWER TO THE LAW OF GOD.
This was directed By Moses when God gave the ten commandments, and found the people worshipping an IMAGE OF A BEAST (golden calf), satan's answer to worship of God.
And the image of the beast is in the same
Rev 13 that the mark is in. This is how I personally study these issues out. Find the same picture in the rest of the bible.