CLASS 5 · LEARNING KNOWLEDGE
Divisibility, divisors, and multiples
How it works
A divisor divides a number without remainder. Common divisors help in partitioning; common multiples in recurring events. A prime number is greater than 1 and has exactly two positive divisors.
Note
gcd: greatest common divisor; lcm: least common multiple.
gcd: greatest common divisor; lcm: least common multiple.
An example
Determine the greatest common divisor of 18 and 81. Provide only the requested number.
Determine the positive divisors of both numbers. The greatest common divisor is 9. Result: 9.
Try it yourself now
50 Exercises · three difficulty levels · selection and number input
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: KMK Educational Standards Mathematics ESA/MSA. The topic assignment may vary by federal state.