Jeremy has three times as many Pokémon cards as Evan. Marc has 20 cards more than Jeremy. Evan has 15 cards lesser than Leroy. They have a total of 155 cards altogether. Find the number of cards Marc has.

Jean and Ginny had the same amount of crayons at first. After Jean bought 50 crayons and Ginny bought 12 crayons, Jean has three times as many crayon as Ginny. How many crayons did both of them have altogether in the end? Round off your answer to the nearest 10.

Shelly sold three times more cheesecakes than cupcakes. After selling each cheesecake at $9 and each cupcake at $3, the total sale for that day was $2400. How many cheesecakes and cupcakes did she sell on that day?

Mrs Lilian bought 6 bags of cookies for her children. If she gives 10 cookies to each child, she will have 2 cookies left. If she gives 15 cookies to each child, she will need 18 more cookies. How many cookies are there in each bag?

Glenn poured 7L 800ml of orange juice into 17 of cups and glasses and filled them up completely. The capacity of a cup is 400ml and the capacity of a glass is 600ml. How many glasses did he use?