Pair Picnic
An even collection can be paired with none left over. An odd collection leaves one unpaired. Adding two keeps the same odd/even family.
Before you try
Before you play, make a prediction: Which number can be completely paired? Explain what you expect and what part of the model will help you check it.
Try it out
Interactive activity
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What happened?
Move a control to see what changes and why.
The game practises one idea at a time with simple drawn pictures. Check the same idea with real objects and your NCERT textbook (Chapter 3: Pattern Around Us, pages 34–38).
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Try these ideas
- Pair the counters and use the leftover to decide.
- Try a new puzzle with ↻. Describe what changed and which mathematical rule stayed the same.
- Complete a round, then explain your method before you move to the next one.
Why it works
An even collection can be paired with none left over. An odd collection leaves one unpaired. Adding two keeps the same odd/even family.
Seven counters form three pairs with one left over, so seven is odd. Pair the counters and use the leftover to decide.
The size of a number does not decide odd or even. Pairing, or the ones digit, does.
This activity connects to Pattern Around Us, NCERT Class 4 maths, printed pages 34–38. Use the picture or objects to explain each step before relying on a calculation. The game practises one part of the chapter at a time; the other three activities extend the chapter’s ideas.
Worked example: Is 13 odd or even? Pair the counters: six pairs use 12 counters. One counter remains, so 13 is odd.
Check your understanding
Question 1 of 2
Which number can be completely paired?
Adding 2 to an odd number gives…
Explain it in your own words
What changed? Why did it happen? Where might you notice this in everyday life?
For parents & teachers
- Try with everyday materials. Pair the counters and use the leftover to decide. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. The size of a number does not decide odd or even. Pairing, or the ones digit, does. Ask “How could we check?” and encourage a second representation of the same idea.