Question 1043202
{{{2^0=1}}}
{{{2^1=2}}}
{{{2^2=4}}}
{{{2^3=8}}}
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{{{9=8+0+0+1=1*2^3+0*2^2+0*2^1+1*2^0=1001}}}
{{{15=8+4+2+1=9=1*2^3+1*2^2+1*2^1+1*2^0=1111}}}