Prime and Composite Numbers

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 $2$.

Express $12$ as sum of the two odd prime numbers and write the smallest odd prime number as the final answer.

Which of the following is a pair of co-primes?

If $144=x+y$, where $x$ and $y$ are twin prime numbers, then find the value of $x\times y$.

If $36=x+y$, where $x$ and $y$ are twin prime numbers, then find the value of $x\times y$.

If $12=x+y$, where $x$ and $y$ are twin prime numbers, then find the value of $x\times y$.

Write two prime numbers whose sum is also a prime number.

Encircle the prime numbers :
$11, 50, 75, 26, 32, 45$

Encircle the prime numbers :
$25, 33, 9, 7, 80, 15, 1$

Write the smallest prime number.

Which is the greatest prime number less than $50$? _____

Write the number of all the prime numbers between $75$ and $125$.