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In the following number series only one number is wrong. Find out the wrong number.
The pattern followed is :
6 $$\times 1 - 2$$ = 4
4 $$\times 2 - 3$$ = 5
5 $$\times 3 - 4$$ = 11
11 $$\times 4 - 5$$ = 39
39 $$\times 5 - 6$$ = 189 $$\neq 179$$
189 $$\times 6 - 7$$ = 1127
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