Number Theory

Divisible Number

Fill in the missing digit to make numbers divisible. Apply divisibility rules through hands-on problem solving!

Divisible Number
Settings
Steps
Divisors
Difficulty
Game Mode
Questions
Summary
Divisors to practise
Choose which divisors you want to practise. Select one or more.
2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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No divisors selected
Step 1 of 5
Difficulty
Choose the complexity of numbers in your puzzles.
1
Level 1

2–3 digit numbers

2
Level 2

3–4 digit numbers

3
Level 3

4–6 digit numbers

Step 2 of 5
Game Mode
How would you like to play?
Fixed Questions

Answer a set number

at your own pace

Timed Challenge

Answer as many as possible

against the clock

Step 3 of 5
Number of Questions
How many puzzles would you like to solve?
5
10
15
20
Step 4 of 5
Ready to play?
Check your settings before starting.
Divisors —
Difficulty —
Mode —
Questions —
Step 5 of 5
Score
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Question
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Accuracy
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🔢 Ready to solve missing digit puzzles?

Fill in the missing digit to make numbers divisible!

🏆
Challenge complete
Great work!
0%
Accuracy
0
Correct
0
Answered
Question review
How to play
1
Choose your divisors
Pick which divisors to practise — use quick-select presets or tap individual numbers 2–12.
2
Fill in the missing digit
A number appears with one digit missing. Enter the digit (0–9) that makes it divisible by the given divisor. You get one attempt!
3
Check and continue
Press Check Answer to see if you're right. Then press Next Question to continue.
4_2 ÷ 3 = ?
Answer: 4+_+2 digits must sum to a multiple of 3. _ = 0 gives 402 ÷ 3 = 134 ✓