Pattern Recognition Question - 1

Pattern recognition as the name implies is the ability to catch the hidden pattern. CAT and other MBA entrances emphasize on this topic due to certain reasons:

• No advanced mathematical skill needed.
• Logic is king.
• You are expected to be a manager in future. Being a manager, it is expected that you can recognize the pattern. Say company makes high profits in September and sales slow down in October, then it is expected from you that you could curl out this pattern. And for this reason pattern recognition has always been there and it can be a decisive area.

We shall see the question on pattern recognition for some days. I do remember that question on number system - base concept are yet to be posted. That I will do it in few days.  

Question:

What would be the sum, in thousands, of all the possible four digits numbers that you could make with the digits 2,3,4,5 and 6.

OPTIONS ARE NOT NEEDED! For solution see this video: