Cambridge A Level Chapter 1 - Data Rrepresentation. Candidates should be able to: Show understanding of binary magnitudes and the difference between binary prefixes and decimal prefixes. Understand the difference between and use: •kibi and kilo •mebi and mega •gibi and giga •tebi and tera Show understanding of the basis of different number systems. •Use the binary, denary, hexadecimal number bases and Binary Coded Decimal (BCD) •One’s and two’s complement representation for binary numbers. Perf