Problem of the Week

Mild:

How many different faces can you make with these elements? Each face has a face, eyes and a mouth.

Medium:

Nellie went shopping with money she had saved. At the first shop she visited, Nellie gave half of her money to the shopkeeper to buy a pencil case. He gave her $4 back in change. Then Nellie bought a book for $10 and a keyring for $6. She had $3 left. How much money did she start with?

 Spicy:

How many white squares will surround one row of 50 black squares?