Sorry, it's beyond me

[Dzungqn]

Test No. incompl/elem-31 "Responses (4)", question 5

Mike: 'Then you add the square root and multiply by 67, do you follow?'
Jane: '.........'

(a) Sorry, it's over me.
(b) Sorry, it's past me.
(c) Sorry, it's beyond me.
(d) Sorry, it's after me.

Test No. incompl/elem-31 "Responses (4)", answer 5

Mike: 'Then you add the square root and multiply by 67, do you follow?'
Jane: 'Sorry, it's beyond me.'

Correct answer: (c) Sorry, it's beyond me.

Your answer was: incorrect
Mike: 'Then you add the square root and multiply by 67, do you follow?'
Jane: 'Sorry, it's past me.'
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why "Sorry, it's beyond me"

[Alan]

This expression simply means that you cannot follow something or you don't understand. You ask why beyond? The only explanation I can give is that it comes from beyond my understandingor going much further than I can understand. There is another expression beyond the blue horizon, which means outside the world as we know it.
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English as a Second Language
You can read my ESL story A day in the life of a flat hunter