Powers of 2 Bits Alternatives Each additional bit doubles the number of possibilities 2345 248 Start with one you know and double or halve until 16 you have what you need 32 E.g., if you know 8 is 256, 64 10 must be 4 times as 128 large or 1,024 678 256 Memorize for 1. 4.8. and 10 1.024 16 bits 16 65536 1313 Powers of 2 Bits Alternatives 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 256 10 1,024 16 65,536 Each additional bit doubles the number of possibilities Start with one you know and double or halve until you have what you need E.g., if you know 8 is 256, 10 must be 4 times as large or 1,024. Memorize for 1, 4, 8, and 16 bits