Ответ:

  1. \(126_{10}=1111110_2=176_8=7E_{16}\).
  2. \(111100111_2=256+128+64+32+4+2+1=487_{10}\).
  3. \(111100111_2=747_8=1E7_{16}\).
  4. \(327_8=3\cdot64+2\cdot8+7=215_{10}\).
  5. \(2DC_{16}=2\cdot256+13\cdot16+12=732_{10}\).
  6. \(6524_8=2964_{10}=B94_{16}\).
  7. \(ABCD_{16}=1257155_8\).