Find the HCF of $105$ and $120$.

Find the HCF of $184, 230$ and $276$.

Use Euclid's division algorithm to find the HCF of $136, 170$ and $255$.

Express the HCF of the following two numbers as a linear combination of them.

$963$ and $657$

If the linear combination is $657\times 22-963\times k$, find the value of $k$?

Find the HCF of the following pair of integers and express it as a linear combination of them.

$595$ and $252$

If the linear combination is $252\times 26-595\times k$ , find the value of $k$ ?

If the HCF of $506$ and $1155$ can be expressed as a linear combination of them as $506\times k-1155\times 7$, then find the value of $k$.