What does 'equally likely' mean with a dice?

It means every outcome has the same chance of happening. A normal dice has 6 same-sized faces, so each number from 1 to 6 has a 1 in 6 chance — none is favoured over another.

Why does a bigger slice on a spinner have a higher chance?

The pointer is more likely to stop over a larger area. If red covers half the spinner, it has a 1 in 2 chance, while a quarter-sized blue slice only has a 1 in 4 chance.

What is the difference between impossible, maybe, and certain?

Impossible means it can never happen (like rolling a 7 on a normal dice). Certain means it must happen (like rolling a number less than 7). Maybe covers everything in between, where the outcome could go either way.

How do you write the chance of rolling a 4 on a dice?

There is 1 way to roll a 4 out of 6 possible faces, so the chance is '1 in 6'. The top number counts the outcomes you want; the bottom number counts all the equal outcomes.

What age or level is probability with dice and spinners for?

It suits Singapore primary learners aged roughly 6 to 12. Younger children focus on the language of chance (impossible, maybe, certain), while older primary pupils begin counting outcomes like 1 in 6 or 1 in 4.

How Dice And Spinners Show Chance

Math Interactive lesson Free to play

Probability with dice and spinners is the study of how likely an outcome is when you roll a dice or spin a spinner. Every chance sits somewhere between impossible (it can never happen) and certain (it must happen), with 'maybe' outcomes in between — and probability puts those everyday words onto a clear scale.

This matters because chance is everywhere: predicting weather, playing board games, and later, reading statistics and making fair decisions. A fair dice has 6 equal faces, so each number has a 1 in 6 chance — the faces are equally likely. A spinner with 4 equal colours gives each colour a 1 in 4 chance. The key idea is that equal-sized parts share the chance equally, while unequal parts do not: a spinner with a bigger red slice lands on red more often than on a smaller green slice.

Learners come away able to order outcomes from impossible to certain, count favourable outcomes out of the total (like '1 way out of 6'), and explain why equal parts mean equal chance while unequal parts change the odds.

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What this Spark covers

What is chance?

🎲🎡 How Dice and Spinners Show Chance Some things are sure to happen. Some cannot happen. And some things might happen — we just don't know for sure! The chance that something happens is called probability. Dice 🎲 and spinners 🎡 are fun toys that help us see chance in action. Tap Next to start exploring. 👉
Sure, maybe, or never?

Sure, maybe, or never? Every chance lives somewhere on this line: Impossible Maybe Certain Read each one and pick how likely it is. Don't worry — you can try again! Impossible Maybe Certain
Roll the dice

The dice has 6 faces 🎲 A normal dice has the numbers 1, 2, 3, 4, 5, 6 — one on each face. Tap the dice to roll it and watch what comes up! 🎲 Roll the dice! Total rolls: 0 Roll lots of times — every number turns up about the same amount. That's because each face is equally likely!
Equally likely

Each face has an equal chance Because all 6 faces are the same size, the dice doesn't pick favourites. Each number has a 1 in 6 chance. ⚖️ 1 way to roll a 4, out of 6 possible numbers → chance = 1 out of 6. Quick think: on one roll of a dice, how many ways can you roll a 5? 0 ways 1 way 6 ways
Spin the spinner

Spinners show chance too 🎡 This spinner has 4 equal colours. Each colour has the same chance — 1 in 4. Give it a spin! 🔻 🎡 Spin! Each colour fills the same amount of the circle, so each is equally likely to win.
A tricky spinner

What if the parts aren't equal? Now the colours are different sizes. A bigger slice means a bigger chance of landing there. Red = half • Blue = quarter • Green = quarter Which colour is this spinner most likely to land on? 🔴 Red 🔵 Blue 🟢 Green
Likely or unlikely?

Putting it together Tap each card to flip it over and check your thinking. Then answer the question below! 🎲 Rolling a number less than 7 on a dice. ✅ Certain! Every face (1–6) is less than 7, so it always happens. 🎲 Rolling a 9 on a normal dice. 🚫 Impossible! A dice only goes up to 6 — there is no 9. On a 6-faced dice, is rolling an even number (2, 4 or 6) more likely, less likely, or just as likely as rolling an odd number (1, 3 or 5)? More likely Just as likely Less likely
You're a chance champion!

🏆🎲🎡 Brilliant work! You now know how dice and spinners show chance: ★ Chance goes from impossible → maybe → certain. ★ A dice has 6 equal faces, so each number is 1 in 6 — equally likely. ★ A spinner with equal slices gives every colour the same chance. ★ A bigger slice means a bigger chance of landing there. ★ More ways for something to happen = more likely. Next time you play a board game, you'll know exactly how lucky that roll really is! 🎉

Frequently asked questions

What does 'equally likely' mean with a dice?: It means every outcome has the same chance of happening. A normal dice has 6 same-sized faces, so each number from 1 to 6 has a 1 in 6 chance — none is favoured over another.
Why does a bigger slice on a spinner have a higher chance?: The pointer is more likely to stop over a larger area. If red covers half the spinner, it has a 1 in 2 chance, while a quarter-sized blue slice only has a 1 in 4 chance.
What is the difference between impossible, maybe, and certain?: Impossible means it can never happen (like rolling a 7 on a normal dice). Certain means it must happen (like rolling a number less than 7). Maybe covers everything in between, where the outcome could go either way.
How do you write the chance of rolling a 4 on a dice?: There is 1 way to roll a 4 out of 6 possible faces, so the chance is '1 in 6'. The top number counts the outcomes you want; the bottom number counts all the equal outcomes.
What age or level is probability with dice and spinners for?: It suits Singapore primary learners aged roughly 6 to 12. Younger children focus on the language of chance (impossible, maybe, certain), while older primary pupils begin counting outcomes like 1 in 6 or 1 in 4.

How Dice And Spinners Show Chance

What this Spark covers

Frequently asked questions

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