Question

What is the decimal equivalent of the binary number 1102?

Answer 1

1102 is not binary! 1101 is. (binary digits: 0 & 1)

from right digit to the left:
`1 * 2^(0) + 0 * 2^(1) + 1 * 2^(2) + 1 * 2^(3) = 1 + 0 + 4 + 8 = 13`