Chunking numbers — Memory techniques for students

Memory tip

Fewer, bigger pieces — “group digits so the small desk of memory holds them”

1. Split long numbers into groups of 3 or 4: a 10-digit phone number as 3-3-4; a 12-digit number as 4-4-4.
2. Dates: 2 digits for the day, 2 for the month, 4 for the year: 26011950 → 26/01/1950.
3. Check every digit stays in the same order — chunks group digits, they never change them.

Use it for: Phone numbers, roll numbers, dates in history, PIN codes and long numbers in maths.

Worked example: 🔢 You want to remember the number 1076808485. Which chunked version keeps every digit in the same order? → 107 680 8485

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Lesson 10 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🔢 Chunk Champ badge when you pass — and a certificate when you finish all 6 lessons of Part 2 · Mnemonics. You can still take the test without signing in.

🖨️ Mnemonics Worksheet: Chunking Numbers

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)