Class 3 Algorithm Questions with Answers

An algorithm is a set of step-by-step instructions to finish a task, like a recipe or the steps for brushing your teeth. Computers follow algorithms exactly, in order, which is why the order of the steps matters. This Class 3 topic is the first real step into coding.

What your child should know

• An algorithm is a list of clear steps to solve a problem or finish a task.
• The order of steps matters. Mixed-up steps give the wrong result.
• Everyday examples: a recipe, getting ready for school, planting a seed.
• Computers follow algorithms exactly as written.

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5 Algorithm questions with answers

Read each question with your child and let them answer before you open Show answer.

Q1. What happens if the steps in an algorithm are mixed up?

A) The task may not work correctly
B) The computer becomes bigger
C) The keyboard changes color
D) The monitor turns into a printer

Show answer

Answer: A) The task may not work correctly

Wrong order can lead to incorrect results.

Q2. Which step comes after turning on a computer?

A) Shut it down immediately
B) Wait for it to start and log in
C) Unplug the power cable
D) Close the monitor

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Answer: B) Wait for it to start and log in

You should wait for the computer to start before using it.

Q3. Which of these is the best description of step-by-step thinking?

A) Guessing the answer
B) Doing actions in a logical order
C) Skipping important steps
D) Working without a plan

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Answer: B) Doing actions in a logical order

Step-by-step thinking means following actions in the correct logical order.

Q4. Which step should come first when brushing your teeth?

A) Rinse your mouth
B) Put toothpaste on the toothbrush
C) Brush your teeth
D) Put the toothbrush away

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Answer: B) Put toothpaste on the toothbrush

You put toothpaste on the toothbrush before brushing.

Q5. Why should the steps in an algorithm be in the correct order?

A) To make the computer colorful
B) To save electricity
C) To complete the task correctly
D) To make the screen brighter

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Answer: C) To complete the task correctly

Correct order helps the task work properly.

How to practise algorithm at home

• Ask your child to write the algorithm for making a sandwich, then follow it exactly as written. Missing steps become very funny very quickly.
• Mix up the steps of a routine and ask your child to put them in order.
• Try a free block-coding game where a character follows the steps your child sets.

Keep going

More Class 3 Computer questions · Class 3 Input, Output and Storage Devices Questions with Answers · All practice questions

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