Number Skills Worksheet Generator

Some answers can be checked far more strongly than by working them out again, and it matters which check you use. A prime factorisation is right when the factors multiply back to the number and every factor is prime — checking only the product would accept 12 = 2 × 6. A highest common factor must divide both numbers and be the largest that does; checking only divisibility would accept any common factor at all. Every answer here is held to the whole definition.

School year

Sets the level below to the number range usually worked with at that age. Move the level afterwards if it is not right for this child.

What to practise

Level

How many questions

Between 1 and 100.

Columns

How the sheet is laid out, 1 to 4.

Seed (optional)

A word reproduces exactly the same sheet.

Paper size

Print size

Margin

Millimetres of blank edge, 5 to 40.

Turn the paper sideways

How to print this, or save it as a PDF

There is no PDF to download, and there does not need to be. Open the print command in your browser and choose “Save as PDF” as the destination. The page addresses and dates a browser normally prints across the top and bottom are already kept off.
Set the scale to 100%, not “fit to page”. This sheet is already the exact size of the paper you chose, so anything that resizes it makes every measurement on it wrong.
Leave the paper size in the dialog set to the same one you chose here.

Your worksheet will appear here.

What this generator does

Produces a numbered sheet at the level you choose, none repeated, with an answer key and a line of method for each question.

How to use this tool

Choose what to practise and how large the numbers should be.
Set how many questions and how many columns.
Show the answers to get the key, with the method for each.
Give a seed to print the same sheet twice.

Understanding the controls

What to practise: Prime factors, highest common factor, lowest common multiple, rounding, place value, powers, square roots or negative numbers.
School year: Year, Grade and Class are three names for one choice. Making it sets the level to the range usual at that age, which you can then move.
Level: Sets how large the numbers get. The numbers to factorise go up to forty at the first level and up to twenty thousand at the sixth, and the other topics scale with the level in their own way. Place-value questions use four- to six-digit numbers at every level.
How many questions: One to a hundred, all different from each other.
Columns: From a single column to four, depending on how long the questions run.
Paper size and print size: A4, A5, A3, US Letter or Legal, portrait or landscape, with the margin in millimetres and a compact, standard, large-print or giant-print setting. The sheet count updates as you change them.
Seed: Enter a word and the sheet can be printed again identically.

Common use cases

Practice on prime factors, common factors or common multiples
Rounding at a set size of number, and place value
Powers and square roots without a calculator
Negative number practice at a chosen range
Homework with a matching answer key

How this generator works

Each answer faces the check its own definition demands. Factorisations must both multiply back and consist only of primes. A highest common factor must divide both numbers, and every larger number is tried to confirm none of them does. A lowest common multiple must be divisible by both, and every smaller multiple is tried. Place-value questions never ask about a digit that appears twice in the number, since that question would have two right answers.

Randomness and fairness

Numbers are drawn using the browser's secure generator, within the level's range. For as long as the generator is unchanged, a seed rebuilds the same sheet — deterministic, not cryptographic, and meant for printing a sheet twice.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

Square roots are always whole, so questions never produce a decimal answer.
Powers go up to cubes only.
Prime factorisations are built from small primes, so a large prime never appears on its own.
Rounding is to tens, hundreds or thousands rather than to decimal places or significant figures.
Nothing Number Skills Worksheet Generator produces is kept once the page closes — the seed is the only way back to the same output.

Privacy and your data

Numbers and answers stay in your browser. The sheet is not transmitted or stored; what is measured is that a sheet was made and how many questions it has.