Ones and zeros
A computer counts in binary – base 2, with only the digits 0 and 1. The wheel shows a number and the small number after it says which base it is in: 13₁₀ is thirteen as we write it, 1101₂ is the same number in binary. Press SPIN! and pick the other one:
How to convert
- Each binary digit is worth twice the one to its right: 1, 2, 4, 8, 16, 32, 64, 128.
- 1101₂ is 8 + 4 + 0 + 1 = 13.
- The other way, take away the biggest power of two that fits: 13 is 8 + 4 + 1, so 1101.
- Hexadecimal is base 16: after 9 come A to F, so FF₁₆ is 15 × 16 + 15 = 255.
Your score
Score, In a row and Best run are kept beside the wheel. Start again puts the score back to zero:
Three groups
Decimal to binary is on the wheel when it opens. Add binary to decimal, and hexadecimal – the base colours and memory addresses are written in: