CAMBRIDGE IGCSE Topic 1.3 Calculating the size of an image and sound file Also in this topic... CAMBRIDGE IGCSE Topic 1.1 Converting between number systems, part 1 CAMBRIDGE IGCSE Topic 1.1 Converting between number systems, part 2 CAMBRIDGE IGCSE Topic 1.1 Why hexadecimal is used as a beneficial method of data representation CAMBRIDGE IGCSE Topic 1.1 Signed integers using two’s complement CAMBRIDGE IGCSE Topic 1.3 Lossy and lossless compression methods