Problems III

John has sons.

His eldest son is four years older than his second son.

The second son is four years older than the youngest son.

The youngest son is exactly half the age of the eldest.
 

Question: What are the sons' ages? 

Five persons receive gifts.

These gifts are : a scooter, a sweater, a Nintendo, a computer and a radio.

Hints     :      - Marie loves clothing.
                      - Suzie loves the outdoors.
                      - Julie hates electronic games.
                      - Brigitte dislikes music and computers.
                      - Martine loves to type.
 

Question :  Who has which gifts? 

Camp Pineveiw's cook, Margaret Johnson, was just about to begin preparing 
the picnic lunch for all the campers. She already knew she needed to fill 
55 bowls of the same size and capacity with the same amount of food. When she 
was done, she decided to read the guidelines for the picnic, just out of curiosity.
 The guidelines said:

1. Every camper gets their own bowl of soup.
2. Every two campers will get one bowl of spaghetti to share.
3. Every three campers will get one bowl of salad to share.
4. All campers are required to have their own helping of salad, spaghetti, and soup.

After some rapid calculations, Margaret was able to figure out how many campers were going to the picnic. Can you?