Each digit, 1, 2, 3, 4, 5, 6, 7, 8 and 9 is represented by a different letter A, B, C, D, E, F, G, H and I but not necessarily in this order. Further, each of A + B + C, C + D + E, E + F + G and G + H + I is equal to 13.
Determine the value of each of the alphabets such that the above conditions are satisfied.

Three people A, B, C are standing in a line in such a way that C can see both A and B. B can see only A, and A can see none of them. They are shown 5 hats, 2 of which are black and 3 of which are white. After this, they are blindfolded and a hat is placed on each of their heads and the blindfolds are removed. None of them can see his own hat. When C is asked regarding the colour of the hat he is wearing, he is unable to answer. Then B is asked and he too is unable to answer but finally A is asked the same question and he gives the colour of his hat. What is the colour of the hat on A’s head?

In a street there are 5 houses painted 5 different colours. In each house lives a person of a different nationality. The 5 homeowners each drink a different beverage, smoke a different brand of cigar, and keep a different pet.
1. The Brit lives in the Red house.
2. The Swede has a Dog.
3. The Dane drinks Tea.
4. The Green house is on the left of the White house.
5. The owner of the Green house drinks Coffee.
6. The person who smokes Pall Mall has Birds.
7. The owner of the Yellow house smokes Dunhills.
8. The man living in the center house drinks Milk.
9. The Norwegian lives in the first house.
10. The man who smokes Blends lives next to the one who has Cats.
11. The man who has Horses lives next to the man who smokes Dunhills.
12. The man who smokes Blue Master drinks Beer.
13. The German smokes Prince.
14. The Norwegian lives next to the Blue house.
15. The man who smokes Blends has a neighbour who drinks water.

Find out the correct combination of drinks, pets, smokes and colour of the house for each of the five persons.