Explain the differences between the binary number system and the denary number system.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.

1. [1] (a) A binary number system is a base-2 system
2. [1] (a) A denary number system is a base-10 system
3. [1] (a) A binary number system uses 0 and 1 values
4. [1] (a) A denary number system uses 0 to 9 values
5. [1] (a) A binary number system has units/ placeholders/column headings that increase by the power of 2
6. [1] (a) A denary number system has units/ placeholders/column headings that increase by the power of 10
7. [1] (a) Binary has more digit for the same value// Denary has less digits for the same value
8. [1] (b) Correct column headings / place holders by example
9. [1] (b) Correctly place a 1 or a 0 for each column
10. [1] (b) Identify the columns to be added
11. [1] (b) Add together the (denary) values identified ...
12. [1] (b) ... this will give a total which is the denary number/answer
13. [1] (b) Answer is 10