Work every question in your notebook.

1. Trace these lines. What do the boxes hold after line 3?

   n ← 17
   b ← n rem 3 ≠ 2
   c ← n ≥ 17

   1. n = 17, b = true, c = true
   2. n = 17, b = false, c = false
   3. n = 17, b = 2, c = true
   4. n = 17, b = false, c = true

2. What is shown? The first line shown is first.

   y ← 10
   show y > 4 and y < 10
   show y > 4 or y < 10

   1. false, then false
   2. true, then false
   3. true, then true
   4. false, then true

3. A student traced these lines and wrote that pass holds true. The right answer is false. What mistake did the student make?

   score ← 70
   pass ← score > 70 and score ≤ 100

   1. The student used the wrong value of score.
   2. The student forgot that 70 ≤ 100 is false.
   3. The student read ≤ as <.
   4. The student read > as ≥, but 70 is not greater than 70.

4. Which question is true exactly when n is even?

   1. n ÷ 2 = 0
   2. n rem 2 = 2
   3. n rem 2 ≠ 0
   4. n rem 2 = 0

5. Trace these lines. Write exactly what is shown, one line for each show.

   n ← 36
   even ← n rem 2 = 0
   small ← n < 50
   show even and small
   show not small