Plenty in 20
Plenty of numeracy practice in 20 questions. A free collection of interactive maths practice pages covering Year 1 through to GCSE, focusing on the essential number skills students need for mathematical success.
How Plenty in 20 Works
🔄 Generate a fresh set of 20 questions instantly
🔀 Randomise the order of your current questions
👁 Reveal answers individually or all at once
🔍 View any question enlarged with full working
🔊 Hear questions read aloud for accessibility
✓✗ Track correct and incorrect responses live
⏱ Set a countdown challenge from 1 to 10 minutes
⛶ Display all 20 questions for projection
🖨 Print a ready-to-use A4 worksheet with answers
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Why Gemstones?
Each Plenty in 20 is designed with a year group in mind, but they are purposely named with gemstones so you can choose the most appropriate level without anyone knowing.
How to Use Plenty in 20
Questions regenerate infinitely at the click of a button, providing unlimited practice on the fundamentals.
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Teachers
Use Full Screen mode to display all 20 questions on your projector, then work through them together using Score Mode to track performance in real time. Or print as a 1-page write-on worksheet.
Tip: Use Chrome for best printing. Only print page 1 — answers are on page 2!
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Students
Hit 🔊 to hear questions read aloud, use 👁 to check answers instantly, and open the Focus Box for full working when stuck.
Tip: Use Focus (🔍) then Working out (✏️) for step-by-step help when stuck.
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Parents
Levels use gemstone names rather than year groups, so there’s no pressure — find where your child feels confident and build from there.
Tip: Start one or two levels below their age to build confidence.
Jump to Level
💎 Primary (Years 1-6)
Building strong foundations in number from the very beginning
Quartz
Year 1 content
- Count forwards and backwards within 20
- Number bonds within 10 and to 10
- Add and subtract single digits
- Doubles and halves to 20
- Count in 2s, 5s, and 10s
- Place value with teens
- Compare and order to 20
Opal
Year 2 content
- Number bonds to 20
- Add and subtract 2-digit numbers
- 2, 5, and 10 times tables
- Division by 2, 5, and 10
- Find halves and quarters
- Double 2-digit numbers
- Place value to 100
Amber
Year 3 content
- 3, 4, and 8 times tables
- Add and subtract 3-digit numbers
- Multiply and divide 2-digit by 1-digit
- Fractions: add, subtract, equivalent
- Place value to 1000
- Round to nearest 10 and 100
- Number bonds to 100
Jade
Year 4 content
- Written methods for all operations
- 6, 7, 9, 11, 12 times tables
- Factor pairs
- Fractions and equivalent fractions
- Decimal tenths
- Negative numbers introduction
- Multiply and divide by 10 and 100
Topaz
Year 5 content
- Fractions: different denominators
- Mixed numbers and improper fractions
- Add and subtract decimals
- Percentage of amounts (10%, 25%, 50%)
- Square and cube numbers
- Prime numbers to 100
- Order of operations
Ruby
Year 6 content
- Multiply and divide fractions
- Percentage of amounts (any)
- Percentage increase and decrease
- Ratio: simplify and share
- Negative number operations
- Order of operations with brackets
- HCF and LCM
💎 Secondary (Years 7-9)
Consolidating and extending number skills for Key Stage 3
Sapphire
Year 7 content
- Negative number operations
- Convert between FDP
- Fractions: all operations
- Percentage of amounts
- Percentage increase/decrease
- Square and cube numbers
- Simplify and share in ratios
Emerald
Year 8 content
- Multiply and divide decimals
- Mixed number operations
- Express as a percentage
- Three-part ratios
- Direct and inverse proportion
- Calculate with powers
- Convert between metric units
Pearl
Year 9 content
- Round to decimal places and sig figs
- Estimation by rounding
- Complex fraction calculations
- Reverse percentages
- Simple interest
- Percentage multipliers
- Proportion problems
💎 GCSE (Years 10-11)
Essential numeracy for GCSE success — Foundation and Higher tiers
Amethyst
Year 10 Foundation
- Standard form
- Percentage increase/decrease
- Fraction operations
- Powers
- Sharing in a ratio
- Convert between FDP
- Best buy problems
Onyx
Year 10 Higher
- Rounding large numbers
- Index laws
- Negative and zero indices
- Fractional indices
- Compound interest and depreciation
- Coordinate problems
- Simplify surds
Garnet
Year 11 Foundation
- Standard form calculations
- Multiple percentages
- Ratio and proportion problems
- Exchange rates
- Speed, distance, time
- Midpoints
- Fractions of an amount backwards
Diamond
Year 11 Higher
- Surds: simplify, multiply, divide, add
- Rationalise denominators
- Fractional and negative indices
- Upper and lower bounds
- Error intervals
- Direct and inverse proportion
- Recurring decimals to fractions
More levels and skills coming throughout 2026 — keep checking back! 💎