What is the meaning of sixth sence?

[Susan Boyle]

English Language Tests, Intermediate level

ESL/EFL Test #279 "English Slang Idioms (1)", question 10

He seems to have a sixth ......... when it comes to predicting fashion trends.

(a) sense
(b) grade
(c) place
(d) limb

English Language Tests, Intermediate level

ESL/EFL Test #279 "English Slang Idioms (1)", answer 10

He seems to have a sixth sense when it comes to predicting fashion trends.

Correct answer: (a) sense
_________________________

Dear Sir or Madam;
What is the meaning of sixth sence.
Many thanks
Susan Boyle

[Mister Micawber]

grasping the inner nature of things intuitively
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Native English teacher at Mister Micawber's

[Hannahpierre]

Intuition other said this is our sixth sense