1) How do you express 255 as a binary number ? a) 10101101 b) 11111111 c) 01110001 d) 11101011 2) How do you express 25 as a binary number ? a) 11001 b) 10101 c) 00111 d) 11111 3) How do you express 97 as a binary number ? a) 1100001 b) 0111101 c) 1111101 d) 0101011 4) How do you express 127 as a binary number ? a) 0111100 b) 1111001 c) 1111111 d) 0011001 5) Convert this binary number to decimal : 10000001 a) 64 b) 936 c) 125 d) 129 6) Convert this binary number to decimal : 10101011 a) 173 b) 172 c) 171 d) 169 7) Convert this binary number to decimal : 11110001 a) 241 b) 229 c) 256 d) 245

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