The number 189 in binary is the eight-digit number 10111101.
The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent
128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10.
10111101 = 128 + (0x64) + 32 +16 + 8 + 4 + (0x2) + 1 = 189
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189/0.126 = 1500
The number 1 as a binary number is 1
There is no decimal number for the binary number 13 because 13 cannot be a binary number.
No, it is composite.
189 = 33 × 7