HKIMO Final Round 2023

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?

2) 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 books did the book store have originally?

3) According to the pattern shown below, what is the missing number?

4) If 13th June, 2020 is Saturday, which day of the week will 23rd March, 2020 be?

5) There are a total of 48 chickens and rabbits in a farm. The animals have a total of 112 legs. How many chickens are there?

6) There are a total of 64 chickens and rabbits in a farm. The animals have a total of 226 legs. How many rabbits are there?

7.