An Easy Math Conundrum that is Easy to Solve for Kids but Stumps Adults?

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This problem can be solved by pre-school children in five to ten minutes, by programmers in an hour and by people with higher education… Well, try it yourself! How long did it take for you to answer it?

Here is the problem shown above. The answer for the sequence 2581 = ??? would be?

This math problem apparently can be solved even by young children!
However, some adults have found it to be quite challenging and rather difficult!

How about you? Can you solve this math conundrum?

Please watch the video and see how it is solved!


source: YouTube