Colour the countries in the following maps with as few colours as possible but make sure that no two adjacent countries are of the same colour. 

  

Using repeated division method find HCF of the following: $455$ and $26$

Using repeated division method find HCF of the following: $392$ and $256$.

Find HCF of $6765$ and $610$.

Using repeated division method find HCF of the following: $184, 230$ and $276$.