Computer Science for IGCSE & O level - Data Representation (Section 13 - No. 37)

What is the decimal equivalent of the binary number 1101?

1101 in binary is equal to (1 * 2^3) + (1 * 2^2) + (0 * 2^1) + (1 * 2^0) = 8 + 4 + 0 + 1 = 13.