Maths History
The Ishango bone number mystery
Explore one famous ancient counting bone as a child-friendly number-pattern puzzle, with careful wording about what historians know and do not know.
Quick answer
The Ishango bone is a 20,000-year-old ancient tool found in Africa that shows early humans were already working with numbers and patterns. Even though we don’t know exactly what it was used for, it helps us understand how humans first began to count and think mathematically.Learning outcome
By the end of this page, you will understand that ancient people used tools like the Ishango bone to explore number patterns, and you can try your own number pattern puzzles using simple shapes and objects. Success signs:- You can spot number patterns in a set of dots or marks
- You can make your own pattern using shapes or objects
- You can explain how early humans might have used counting tools
- You can compare simple patterns and talk about what they might mean
Why this matters
The Ishango bone shows that people have been interested in numbers for a very, very long time. It helps us understand how maths started, and it shows that even before we had words or writing, people were already thinking about groups, counting, and patterns. Learning about the Ishango bone can make you feel like a detective exploring ancient mysteries, and it helps you see that maths is all around us — even in the oldest parts of human history.How it works
The Ishango bone is a piece of bone with marks carved into it. It was found in the Democratic Republic of Congo, and scientists think it’s over 20,000 years old. The bone has three rows of marks. Some rows look like they might show patterns, and some look like they could be related to counting or even early addition. The exact meaning of the marks is still a mystery, but we can still play with the patterns and think about how they might have been used.Examples you can see
Let’s imagine you are a scientist exploring the Ishango bone. Here are some examples of what you might find: Row 1: 19, 17, 13, 11 Row 2: 31, 19, 11, 7 Row 3: 10, 20, 30, 40 Let’s look at each row carefully. Row 1 shows numbers that go down: 19, 17, 13, 11. These are all odd numbers, and they get smaller. You might notice that if you count backwards by 2s, you get these numbers: 19 – 2 = 17, 17 – 2 = 15, but 15 isn’t there — so maybe there’s another pattern. Row 2: 31, 19, 11, 7 This also goes down. The differences are: 31 – 19 = 12, 19 – 11 = 8, 11 – 7 = 4. These numbers (12, 8, 4) are going down by 4 each time — a pattern! Row 3: 10, 20, 30, 40 This is a very clear pattern — each number is 10 more than the last. That’s easy to see, and it’s called skip counting by 10s. You can also try drawing your own patterns using circles, stars, or lines to make your own "ancient" number mystery!Try it as a mini adventure
Let’s pretend you are an explorer who has found a mysterious ancient tool, like the Ishango bone. Your mission is to figure out what the patterns might mean. Step 1: Draw a line on a piece of paper. Now, make 3 more lines. Count them. How many lines do you have? Step 2: Now, make a pattern using shapes. Start with one circle, then two triangles, then three squares. Keep going — what comes next? Step 3: Try to make a pattern that goes down — like 5, 4, 3, 2, 1. What shapes could you use? Step 4: Ask a grown-up to help you write down your pattern. Then, try to guess what it might mean — is it counting backwards? Is it a game? Is it showing how many things you have? Step 5: Draw your pattern on a piece of paper and give it a name, like "The Mystery of the Shapes" or "The Ancient Counting Puzzle."Common mistakes
- Mistake: Thinking that all the marks on the bone must be the same kind of pattern. Why it happens: We might want everything to fit neatly into one rule. Fix: Remember that the bone might show different patterns, or even just random marks that we don’t understand yet.
- Mistake: Believing that we know exactly what the bone was used for. Why it happens: We sometimes want to know everything right away. Fix: It’s okay not to know everything — that’s how science works. We keep exploring and asking questions.
- Mistake: Thinking that the patterns on the bone are just random. Why it happens: If the numbers don’t look like what we expect, we might think they don’t mean anything. Fix: Even if we don’t understand the full meaning, we can still enjoy looking for patterns and making our own.
Parent and carer guide
You can help your child explore the Ishango bone by:- Letting them draw or make their own patterns with shapes, dots, or stickers
- Encouraging them to talk about what they notice in the numbers
- Not worrying if they don’t fully understand the ancient meaning — that’s okay!
- Using simple language like “This looks like it goes down,” or “This pattern keeps changing.”
- Repeating the idea that science is about asking questions, not just finding answers
- Encouraging them to make up their own "ancient" patterns and give them names
- Reading a little more about ancient tools or counting in history together
Practice questions
- Look at this pattern: 2, 4, 6, 8. What comes next?
- Which of these patterns goes up by 5s? A) 5, 10, 15, 20 B) 10, 20, 30, 40
- Try to make a pattern that goes down: 15, 12, 9, ?
- Can you draw a pattern that has 3 circles, then 6 triangles, then 9 squares?
- What number should come next in this pattern: 10, 20, 30, 40, ?
- 10
- A
- 6
- Draw 3 circles, 6 triangles, 9 squares
- 50
FAQ
What is the Ishango bone?
The Ishango bone is a piece of bone found in Africa, over 20,000 years ago. It has marks carved into it that scientists think might show early number patterns.
Who made the Ishango bone?
We don’t know who made it. It was found in the Democratic Republic of Congo, and it’s one of the oldest known counting tools.
What do the marks mean?
We’re not sure. Some scientists think they show early addition or multiplication, but it’s still a mystery. That’s why it’s called a "mystery."
Why is it important for learning maths?
It shows that humans have always been curious about numbers and patterns. It helps us see that maths is not just something we learn in school — it’s part of how we think and solve problems.
Can I make my own ancient pattern?
Yes! You can use shapes, dots, or even your fingers to make patterns, just like the people who made the Ishango bone.