What number does the ASC11 code 0000 0011 represent?

Check this site.

http://www.mc.maricopa.edu/dept/d07/ascii_table.html

This is unreadable character. It is hex 3.

To find out what number the ASCII code 0000 0011 represents, you need to convert it from binary to decimal. ASCII codes use 7 bits, so add a leading zero to make it a total of 8 bits (0000 0011).

To convert a binary number to decimal, you can multiply each bit by its corresponding power of 2 and then add up the results.

In this case:
0 * 2^7 + 0 * 2^6 + 0 * 2^5 + 0 * 2^4 + 0 * 2^3 + 0 * 2^2 + 1 * 2^1 + 1 * 2^0 = 3

Therefore, the ASCII code 0000 0011 represents the number 3.