Update

exercises.md

@@ -206,7 +206,8 @@ Bear in mind the main purpose of this quiz is for you to test your understanding
 101. Form a word by answering each following sentences with one letter. Binary number 1011 in hexadecimal. Base of natural logarithm. *x = min(max(0,t - 1),1)*, *y = 2 - t for 1 <= t <= 2 otherwise t mod 1*,  *t* goes from 0 to 3. Number whose square is -1. `'U' - 'T' + 'R'`.
 102. In C this `float x = 16777216; printf("%d\n",x == (x + 1));` outputs `1` (or at least it is possible) -- what the fuck. How can a number equal itself plus one? Explain what's going on here.
 103. Can you be both pro-privacy and anti-censorship at the same time?
-104. Did you enjoy this quiz?
+104. What's the error with the following reasoning? *-1 = (-1)^(2/2) = ((-1)^2)^(1/2) = 1^1/2 = 1*.
+105. Did you enjoy this quiz?
 
 ### Answers
 
@@ -314,7 +315,8 @@ sin(x) / cos(x) - log2(2) = tg(x) - 1*, so we get *tg(x) >= 1*. So that will hol
 101. BENIS
 102. [Floating point](float.md) had decreasing precision towards higher values, this one if already beyond the resolution of 1, so the float type cannot represent this number plus one, adding one rounds the result down to the same number.
 103. no
-104. yes
+104. We can't replace *a^(b/c)* with *(a^b)^(1/c)* if *a* is negative, that equation doesn't generally hold.
+105. yes
 
 ## Other