Number properties

Find what divides evenly and what is left over.

Example

Example

Example · Easy

Greatest common divisors and least common multiples

6 questions · No time limit

Ready to start?

Identify the property being asked for, then choose the answer.

Help

A positive factor divides a number with no remainder. Include 1 and the number itself, and count each factor once. The greatest common divisor is the largest factor shared by two numbers. The least common multiple is their smallest shared positive multiple.

Each round has six questions and no time limit. Choosing an answer locks it. Review the steps, then move to the next question. Finish all six to save the round. Active time includes reviewing the steps, but does not count time when this page is hidden. Speed does not affect your score.

Use Tab and Enter or Space to choose an answer. The number keys also select answers, except when another control is focused. After an answer, Enter goes to the next question.

Original practice puzzles, not a standardized assessment.

Share practice

Share this practice

Number properties

View history Report

Keyboard shortcuts

Enter
Start or continue
?
Keyboard shortcuts
Esc
Close help or notes

Each practice may show additional keys.

Tab moves between controls. Enter or Space activates the focused control. Shortcuts pause while typing or viewing help.

About this practice

Find what divides evenly and what is left over.

Report a problem

Sign in free

Practice without limits and keep your progress.