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Grade 7 Computer Science — Combining conditions with and, or and not

Work out whether a condition joined by and, or or not comes out true, and which branch a program takes because of it.

Name: ________________________

  1. 1.A condition says: the number is more than 50 and the number is less than 10. Which numbers make it true?

    • a) The numbers between 10 and 50
    • b) No number at all
    • c) Every number
    • d) Only 10 and 50 themselves

  2. 2.Sort each statement by whether it is true or false.

    Groups: True · False

    • 4 is more than 5 and 4 is less than 9
    • 8 is more than 9 or 8 is more than 10
    • 7 is more than 3 and 7 is less than 10
    • 5 is less than 5 or 5 is more than 5
    • 6 is equal to 6 and 6 is more than 1
    • 2 is more than 5 or 2 is less than 3

  3. 3.A condition says: not (the number is more than 10). The number is 3. Is the condition true?

    • a) No
    • b) There is no way to tell
    • c) Yes
    • d) Only when the number is 10

  4. 4.A program says: if the mark is less than 33 or the attendance is less than 75, print "Not allowed"; otherwise print "Allowed". The mark is 90 and the attendance is 80. What does it print?

  5. 5.A program says: if the number is not more than 10, print "Small"; otherwise print "Large". The number is 30. What does it print?

  6. 6.A program says: if the number is more than 10 and less than 20, print "Middle"; otherwise print "Outside". The number is 12. What does it print?

  7. 7.A program says: if the mark is less than 33 or the attendance is less than 75, print "Not allowed"; otherwise print "Allowed". The mark is 20 and the attendance is 95. What does it print?

  8. 8.A condition says: the number is more than 10 and the number is less than 20. The number is 15. Is the condition true?

    • a) Only if the two halves are equal
    • b) There is no way to tell
    • c) Yes
    • d) No

Answer key — Grade 7 Computer Science — Combining conditions with and, or and not

  1. 1. b) No number at all
  2. 2. 7 is more than 3 and 7 is less than 10 → True; 4 is more than 5 and 4 is less than 9 → False; 2 is more than 5 or 2 is less than 3 → True; 8 is more than 9 or 8 is more than 10 → False; 6 is equal to 6 and 6 is more than 1 → True; 5 is less than 5 or 5 is more than 5 → False
  3. 3. c) Yes
  4. 4. Allowed
  5. 5. Large
  6. 6. Middle
  7. 7. Not allowed
  8. 8. c) Yes