Factors

Let's find and note down twin prime numbers. (from $1$ to $100$)

Let's make a grid and find out the prime numbers in between $1$ and $200$ by the Sieve of Eratosthenes method.

Find the odd numbers that come immediately one after the other are both prime numbers.

For example: $3,5$.

Do they have a different name?

Except for $2$, all prime numbers are _____.

Note down the prime numbers between $1$ to $100$ derived from Sieve of Eratosthenes method.

The following grid shows the multiples of the number from $1$ to $10$.

The multiples of $3$ are blue cells.

Note down the multiples of $3$.

The following grid shows the multiples of the number from $1$ to $10$.

The multiples of $2$ are red cells.

Note down the multiples of $2$.

Give reason to say whether the given statement is true or false.

$12$ is a factor of $96$.

Give reason to say whether the given statement is true or false.

$6$ is a factor of $48$.

Give reason to say whether the given statement is true or false.

$8$ is a factor of $8$.

Give reason to say whether the given statement is true or false.

$7$ is a factor of $25$.

Give reason to say whether the given statement is true or false.

$5$ is a factor of $12$.

Give reason to say whether the given statement is true or false.

$6$ is a factor of $36$.

Find the common factors and highest common factor of the number pair $24, 56$.

Find the common factors and highest common factor of the number pair $44, 64$

Find the common factors and highest common factor of the number pair $36, 48$

Which of the following statement is correct?

$1$ is a divisor of all numbers.

$1$ is a factor of every number.

Circle the number that is prime as well as even.

$3 1 5 2 7$

Write the prime factorisation and prime factors of $48$.