The HCF of two numbers is $13$ and their product is $3549$. What is the LCM?

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

Find the least number of flowers so that bunches of $12, 18$, or $24$ flowers can be made.

Express $36$ as the sum of four primes.

Complete the table below:

Use a factor tree to express each of these numbers as the product of their prime factors.

 $90$

Use a factor tree to express this number as the product of its prime factors.

 $84$

The HCF of $3^2\times 4\times 5^2$, $3\times 4^2\times 5$ is