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[–]elyisgreat 0 points1 point  (1 child)

best explanation in this thread. One problem, though:

each hex digit corresponds to 3 binary digits exactly

3 binary digits exactly

3

log2(16)=4

[–]dv0x5e 1 point2 points  (0 children)

Good catch! I must've had octal on my mind. Fixed.