Results of the Ungraded Discrete Math Quiz

• Question 1: Give the binary representation of 25 (i.e., of the number twenty five in base 10)
  • Answer: 11001
  • Success rate: 56%
• Question 2: Give the base-10 representation of binary number 1011
  • Answer: 11
  • Success rate: 53%
• Question 3: Give the base-10 representation of hexadecimal (base 16) number A3
  • Answer: 163
  • Success rate: 26%
• Question 4: What is the result (in binary) of this binary addition: 11 + 01?
  • Answer: 100
  • Success rate: 49%
• Question 5: What is the largest integer (in base 10) that I can encode in binary using 8 bits?
  • Answer: 255
  • Success rate: 28% (but several “256” answers, which are close)
• Question 6: Write a regular expression that describes all strings that consist of one or more 0’s followed by 0 or more 1’s
  • Answer: 0⁺1^*
  • Success rate: 2% (1 student)