Computers manipulate binary patterns.
Convert the binary pattern 1010 0100 to denary.
Mark scheme
Award one mark for:
- 164 (1)
Example answers and how they were marked
Full marks1/1
164
Why: Correct: 128 + 32 + 4 = 164 (1).
No marks0/1
37
Why: Reads the place values from the wrong end (the left-hand bit as 1), so the value is wrong.
No marks0/1
3
Why: Counts the 1s instead of adding their place values.