[ CBSE CLASS 6 / COMPUTATIONAL THINKING / CHAPTER 10 / 2026-27 ]
Class 6 The Other Side of Zero: Computational Thinking Questions and Answers
The Other Side of Zero CT chapter introduces negative numbers through lifts, temperatures and positive/negative tokens. Students model each situation as moves on a number line (abstraction) and follow addition and subtraction rules step by step (algorithms).
[ WORKED EXAMPLE ]
A lift is on floor 3. It goes down 5 floors. Which floor is it on now? (Ground floor = 0.)
Answer: −2.
- 3 − 5 means move 5 steps left from 3.
- 3 → 2 → 1 → 0 → −1 → −2.
- The lift is on floor −2, two floors below ground.
What this chapter is about
Students meet integers using a building with floors below ground, temperatures below zero, and money owed.
Positive and negative tokens that cancel in pairs make the rules for adding and subtracting integers visible.
The CT skill is modelling: choose a picture (lift, number line, tokens) that turns a word problem into a sequence of moves.
[ PRACTICE MODE / 6 QUESTIONS ]
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A lift is on floor 3. It goes down 5 floors. Which floor is it on now? (Ground floor = 0.)
All The Other Side of Zero questions with answers
Try each one first, then open it to check the answer and the reasoning.
Q1A lift is on floor 3. It goes down 5 floors. Which floor is it on now? (Ground floor = 0.)
- −2
- 2
- −8
- 8
Answer: A. −2
Hint: Count down on a number line from 3.
- 3 − 5 means move 5 steps left from 3.
- 3 → 2 → 1 → 0 → −1 → −2.
- The lift is on floor −2, two floors below ground.
Skill: Abstraction · Level: easy · Report an error
Q2What is −7 + 4?
- −11
- −3
- 3
- 11
Answer: B. −3
Hint: Start at −7 and move 4 steps right.
- Adding a positive number moves right on the number line.
- −7 → −6 → −5 → −4 → −3.
- So −7 + 4 = −3.
Skill: Algorithmic thinking · Level: easy · Report an error
Q3Which number is the smallest?
- −2
- 0
- −9
- 3
Answer: C. −9
Hint: On a number line, the smallest number is furthest to the left.
- Negative numbers are left of 0.
- −9 is further left than −2.
- So −9 is the smallest.
Skill: Abstraction · Level: easy · Report an error
Q4The temperature is 5°C at noon and drops 8°C by night. What is the night temperature?
- 3°C
- −3°C
- −13°C
- 13°C
Answer: B. −3°C
Hint: A drop means subtract. Pass through 0.
- 5 − 8: going down 5 reaches 0.
- 3 more degrees down reaches −3.
- The night temperature is −3°C.
Skill: Abstraction · Level: medium · Report an error
Q5What is 3 − (−4)?
- −1
- 1
- 7
- −7
Answer: C. 7
Hint: Taking away a debt makes you better off.
- Subtracting a negative is the same as adding a positive.
- 3 − (−4) = 3 + 4.
- 3 + 4 = 7.
Skill: Algorithmic thinking · Level: challenge · Report an error
Q6Each positive token is +1 and each negative token is −1; one of each cancels out. What is the value of 5 positive and 8 negative tokens?
- 3
- −3
- 13
- −13
Answer: B. −3
Hint: Pair each positive with a negative and see what is left.
- 5 positive tokens cancel 5 negative tokens.
- 3 negative tokens remain.
- The value is −3.
Skill: Pattern recognition · Level: medium · Report an error
Frequently asked questions
What does the Class 6 The Other Side of Zero Computational Thinking chapter cover?
The Other Side of Zero CT chapter introduces negative numbers through lifts, temperatures and positive/negative tokens. Students model each situation as moves on a number line (abstraction) and follow addition and subtraction rules step by step (algorithms).
Which computational thinking skills does The Other Side of Zero use?
The Other Side of Zero mainly practises abstraction, algorithmic thinking, pattern recognition. It links to Ganita Prakash Chapter 10: The Other Side of Zero.
Where are the official CBSE The Other Side of Zero questions?
The official questions are in the CBSE Class 6 Computational Thinking and AI handbook for 2026-27, free on the CBSE Academic website. The practice on this page is original and mapped to the same chapter.