If the tiles cannot be arranged into a rectangle or square it is a prime number.
When it is divisible by itself and one.
To identify whether a number is prime or composite, look at its factors. A prime number has exactly two factors: one and itself. A composite number has more factors and can be written as the product of prime numbers. For example: Factors of 17: 1 and 17 so 17 is prime. Factors of 102: 1, 2, 3, 6, 17, 34, 51 and 102 so 102 is composite. It can be expressed as the product of prime numbers by prime factoring: 2 x 3 x 17
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
A prime number has only two factors which are itself and one whereas a composite number has more than two factors
Identify each number as prime, composite or neither: 1
Any prime number has only 2 factors which are itself and one
The only arrangement is 1 x 11, identifying the number as prime.
If the tiles cannot be arranged into a rectangle or square it is a prime number.
You can arrange them in one row or column of 11 tiles, identifying the number as prime.
When it is divisible by itself and one.
The only possible rectangle is 1 x 11, which identifies 11 as a prime number.
Prime squares
Find the prime factorization. Identify the distinct prime factors. Add them up.
13 and 19 are prime. 33 and 45 are composite.
factor tree
To identify whether a number is prime or composite, look at its factors. A prime number has exactly two factors: one and itself. A composite number has more factors and can be written as the product of prime numbers. For example: Factors of 17: 1 and 17 so 17 is prime. Factors of 102: 1, 2, 3, 6, 17, 34, 51 and 102 so 102 is composite. It can be expressed as the product of prime numbers by prime factoring: 2 x 3 x 17