1.125
2.8,8
3.9012
4.12
5.2012
6A=46.25,B=-37.75,C=-3.5
7.1/2
8.25%
9.A>B>C
10.801
¤@ if2^4006+2^n=2^4006(1+2^(n-4006))is a prefect square,(1+2^(n-4006))must be a prefect square.obviously n-4006=3 is a solution.n=4009
¤G let he went at 12:a and back at 12:b.
for a
a/60*360+a/60*360/12=55
a=10
for b
360-6b+b/2=55
b=610/11
so he went for b-a=500/11minute