Number Tracks
Place value decides which count is greater. A growing or shrinking rule produces a predictable sequence. Compare the changes, not just the final digits.
Before you try
Before you play, make a prediction: Which is the smallest? Explain what you expect and what part of the model will help you check it.
Try it out
Interactive activity
Sign in to play
Use a Google account (yours or a parent’s) to unlock this simulator. We store only your name and email so your favourites and progress follow you.
Signing in needs an internet connection. Once you are signed in, simulators also work offline.
Free preview
Loading controls…
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 10: Elephants, Tigers and Leopards, pages 149–163).
Something went wrong
This simulator could not load. Check your connection and try again.
Try these ideas
- Order the animal-count cards and explain the gap between neighbours.
- 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
Place value decides which count is greater. A growing or shrinking rule produces a predictable sequence. Compare the changes, not just the final digits.
Starting at 1200 and adding 25 gives 1225, 1250 and 1275. Order the animal-count cards and explain the gap between neighbours.
Trailing digits can distract you. Compare thousands, hundreds, tens and then ones.
This activity connects to Elephants, Tigers and Leopards, NCERT Class 4 maths, printed pages 149–163. 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: Continue 1,250, 1,300, 1,350. The gap between neighbouring counts is 50. Add 50 to 1,350 to get 1,400.
Check your understanding
Question 1 of 2
Which is the smallest?
Which continues 2,000, 1,900, 1,800?
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. Order the animal-count cards and explain the gap between neighbours. Ask the child to make a new example using paper, counters, household objects or a labelled sketch.
- Listen to the explanation. Trailing digits can distract you. Compare thousands, hundreds, tens and then ones. Ask “How could we check?” and encourage a second representation of the same idea.