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Simply keep dividing by 2, and make a note of the remainder each time...

249/2 = 124 r 1

124/2 = 62 r 0

62/2 = 31 r 0

31/2 = 15 r 1

15/2 = 7 r 1

7/2 = 3 r 1

3/2 = 1 r 1

1/2 = 0 r 1...

Now - reading from the bottom up you get the binary number 11111001.

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13y ago

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Q: How do you convert the decimal number 249 to base 2?
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