Leo has a toy car collection.
He gave 15 cars to his younger brother.
Now Leo only has 24 cars.
How many toy cars did Leo have at first?

Drew had $36.
He bought a hockey stick.
Then he had $21 left.
How much did the hockey stick cost?

Anton bought a package of cookies.
He ate 7 and had 31 left.
How many cookies were in the package at first?

Britta had 62 stickers.
She bought some more.
Then she had 78 stickers.
How many stickers did she buy?

There were 32 members in the band.
12 drummers joined them.
How many members did the band have then?