Maths quiz algorithm with harder and easier questions

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Quick Questions

Shade in the A or B circle for each question.

1. A quiz algorithm keeps a variable called score. What should happen to score when the student gives a RIGHT answer?

A score ← score + 1

B score ← 0

2. Which step belongs inside the loop so the quiz keeps asking questions?

A REPEAT: ask a question, check the answer

B Ask one question, then stop

3. The quiz has this rule: IF the student gets two wrong answers in a row THEN ask an easier question. What kind of step is this?

A Sequence only, because every student gets the same steps

B Branching, because the algorithm chooses a path based on a condition

4. Where should the line 'score ← 0' go in a quiz algorithm?

A At the start, before the first question

B Inside the loop, after every question

5. A student answers 7 × 8 and gets it wrong. What happens to the score variable?

A It goes up by 1

B It stays the same

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1IF answer = correct THEN score ← score + 1		AThe branch resets the score instead of choosing an easier question. It should pick an easier question when wrongInRow is 2.
2IF wrongInRow = 2 THEN use easier question		Bscore ← 0
3The quiz repeats the question steps until 5 questions have been asked		CIf the answer is right, add 1 to the score variable
4The quiz starts with a score variable set to 0 before any questions are asked		DREPEAT UNTIL questionsAsked = 5
5IF answer = correct THEN score ← 1		EThis sets score to 1 instead of adding 1. The score will never go above 1. It should be score ← score + 1.
6IF wrongInRow = 2 THEN score ← 0		FAfter two wrong answers in a row, switch to an easier question

Definitions

quiz algorithm

Fill in the Blanks

Complete each line of code by filling in the missing parts.

SET score ← 0 ______ 5 TIMES ASK a maths question

IF answer = correct THEN SET score ← score _ 1 END IF

IF answer = correct THEN SET _____ ← score + 1 END IF

IF wrong = _ THEN ASK an easier question END IF

IF score __ 4 THEN ASK a harder question END IF

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A score ← 0

B REPEAT 5 TIMES

C ASK a maths question

D IF answer is wrong THEN

E score ← score + 1

Question 2

A score ← 0

B wrong ← 1

C ASK a maths question

D IF answer is right THEN

E score ← score + 1

Question 3

A score ← 0

B ASK a maths question

C IF answer is right THEN

D score ← score - 1

Question 4

A score ← 0

B REPEAT 5

C ASK a maths question

D IF answer is right THEN

Question 5

A score ← 0

B wrong ← 0

C IF answer is wrong

D wrong ← wrong + 1

E IF wrong = 2 THEN

Answer Key

Maths quiz algorithm with harder and easier questions

Section A: Quick Questions

A — score ← score + 1

A — REPEAT: ask a question, check the answer

B — Branching, because the algorithm chooses a path based on a condition

A — At the start, before the first question

B — It stays the same

Section B: Match the Pairs

IF answer = correct THEN score ← score + 1 → If the answer is right, add 1 to the score variable

IF wrongInRow = 2 THEN use easier question → After two wrong answers in a row, switch to an easier question

The quiz repeats the question steps until 5 questions have been asked → REPEAT UNTIL questionsAsked = 5

The quiz starts with a score variable set to 0 before any questions are asked → score ← 0

IF answer = correct THEN score ← 1 → This sets score to 1 instead of adding 1. The score will never go above 1. It should be score ← score + 1.

IF wrongInRow = 2 THEN score ← 0 → The branch resets the score instead of choosing an easier question. It should pick an easier question when wrongInRow is 2.

Section C: Definitions

quiz algorithm — An algorithm that repeats questions, adds 1 to a score variable for each right answer, and picks harder or easier questions depending on that score.

Section D: Fill in the Blanks

SET score ← 0
REPEAT 5 TIMES
  ASK a maths question

IF answer = correct THEN
  SET score ← score + 1
END IF

IF answer = correct THEN
  SET score ← score + 1
END IF

IF wrong = 2 THEN
  ASK an easier question
END IF

IF score >= 4 THEN
  ASK a harder question
END IF

Section E: Spot the Error

D — The score should go up when the answer is right. The line should be IF answer is right THEN, so that score ← score + 1 only runs for a right answer.

B — The student has not answered anything yet, so the wrong counter must start at 0. It should be wrong ← 0.

D — A right answer adds 1 to the score. It should be score ← score + 1, not minus 1.

B — The repeat line must say how many times to repeat. It should be REPEAT 5 TIMES.

C — An IF line needs the word THEN at the end. It should be IF answer is wrong THEN.