The binary numeral system is a system using two numbers which are 1 and 0. The places have different values, the first value is 1, the second is 2, the third value is 4, the fourth value is 8 and so on. You determine the next value by multiplying by the current value by 2.

For example 18 in binary would be 10010, and 17 would be 10001.

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