Level 2
A box is 700 g when it is filled with stickers.
If 35 of the stickers are removed,
the mass of the box with the remaining stickers is 400 g.
What is the mass of the empty box?
Level 2
Janet and her two sisters shared the bill in a restaurant equally. If each of them paid $22 inclusive of a service charge of 10%, how much is the total service charge?
Level 2
Tesssa has $16 worth of coins. 12 of them are 50¢ coins and 5 of them are 20¢ coins. The rest are $1 coins. How many coins does Tesssa have altogether?