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Put two and two together to get 100 And still be right!!!

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Presentation on theme: "Put two and two together to get 100 And still be right!!!"— Presentation transcript:

1 Put two and two together to get 100 And still be right!!!

2 Twice the Average Riddle 10 legs sat upon 11 legs with 1 leg on his lap. In comes 100 legs, picks up 1 leg and runs away from 10 legs. Up jumps 10 legs, picks up 11 legs, throws it at 100 legs and makes him bring back 1 leg. Explain what has taken place.

3 Solution to Riddle. 10 legs is a man/woman. 11 legs is a three-legged stool. 100 legs is a four legged dog. 1 leg is a leg of ham. All numbers are expressed in binary.

4 Binary Arithmetic In binary arithmetic there are just two digits, 0 and 1 (unlike decimal where there are ten, 0,1,2,3,4,5,6,7,8, and 9). In binary, 0 means zero and 1 means one. However, 10 in binary means 1x2 + 0x1 i.e. 2 in decimal. 11 in binary means 1x2 + 1x1 i.e. 3 in decimal 100 in binary means 1x4 + 0x2 + 0x1 i.e. 4 101 in binary means 1x4 + 0x2 + 1x1 i.e. 5

5 From Decimal To Binary Convert a number (25 say) to binary; Divide 25 by 2 to get 12 with remainder 1 Divide 12 by 2 to get 6 with remainder 0 Divide 6 by 2 to get 3 with remainder 0 Divide 3 by 2 to get 1 with remainder 1 Divide 1 by 2 to get 0 with remainder 1 Then the binary for 25 is 11001. i.e. the last remainder is first, then the second last, etc. Try it for the numbers in your date of birth.

6 Why Bother With Binary Calculators and computers work in binary Better understanding of binary ultimately means better design, programming and use of these machines.


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