Mini Sweets bake shop is running a special on cupcakes. For every 10 cupcakes purchased, 3 free cupcakes are added to the order. Edna is getting treats for her class party. She bought 30 cupcakes.How many free cupcakes will be added to Edna's order?

Hugo needs 43 cupcakes for a birthday party. He already has 16 chocolate cupcakes and 10 vanilla cupcakes. How many more cupcakes should Hugo buy?

In a bakery, there are 6 vanilla cupcakes for every 3 chocolate cupcakes. How many vanilla cupcakes are there if the total number of chocolate cupcakes is 12?

Miko and her friends made cupcakes which were to be sold to raise funds for charity. 40% of the cupcakes were sold on the first day. 70% of the remaining cupcakes were sold on the second day. How many cupcakes were there initially if there were 108 cupcakes left after the second day?

Caro bought 33b cupcakes to share with her friends at her birthday party. She gave 3 cupcakes to each of her friends and had 6b cupcakes left. How many friends were there at Caro's party?

Devi bought 29b cupcakes to share with her friends at her birthday party. She gave 4 cupcakes to each of her friends and had 17b cupcakes left. How many friends were there at Devi's party?