In weekend , I always go swimming with my friends . It's fun ! I think the weekend is long enough now because today , I read the book and study very hard to go to 11th grade

Giúp mình với : 

A book store had a box of books. One half but 5 fewer books were sold on the first day. One third of the remaining part and 12 more books were sold on the second day. Finally 20 books are left. How many book(s) did the book store have originally?

 If 18th June, 2020 is Saturday, which day of the week will 23rd February, 2020 be?

Có ai biết hông ?

Này , cậu thi HKIMO 2022 à ? Tui cũng thi cái đó nè ! Cậu đang hỏi cái đề [SEMI-FINAL ROUND HKIMO 2021 - PRIMARY 4] Vòng Chung kết quốc gia Kì thi Toán Quốc tế HKIMO 2021 - Khối 4 đúng không ?

Ôi bạn ơi , bạn là Nguyễn Trung Anh , việt nam chứ ko phải English đâu bạn ơi

Giúp mình với :

1. Andy has 87 marks and John has 72 marks in Mathematics exam. If the average mark of Andy, John and Mary is 85, what is Mary’s exam mark?