Meaning of 'sharp mind'

[petr]

Test No. incompl/inter-50 "Computers", question 5

You have to have a really ......... mind in order to get your head round some of today's computing technology.

(a) acute
(b) cut
(c) razor
(d) sharp

Test No. incompl/inter-50 "Computers", answer 5

You have to have a really sharp mind in order to get your head round today's computing technology.

Correct answer: (d) sharp
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I can't understand this question...

[Alan]

This means you have to be really intelligent to understand computing.
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English as a Second Language
You can read my ESL story Present Simple

[Moneygoodsmoney]

I really like your answers