GRADE 8-FINAL FMO 2021

Fermat Mathematical Olympiad FMO is an annual competition developed and held by Fermat Education – an authorized Vietnamese organization board of many international Olympiad competitions. FMO is a mathematical playground for students from Kindergarten to high schoolers. Unlike other Mathematical Olympiad competitions, which have many difficult problems requiring complicated calculations or various formulae to be solved, FMO 2022 focuses on how students read, understand, and analyze the problems. As a friendly, accessible, and suitable competition for the majority of students, the examination questions of FMO 2022 will be arranged in increasing difficulty and composed relatively close to the curriculum framework. The tedious knowledge in textbooks is now vividly illustrated, thought-provoking, and in specific real-life settings. Students participating in FMO 2022 will be provided an opportunity to review the prior knowledge in a new approach, cultivate their passion for Mathematics and challenge themselves with real-world problems. Any student can participate in FMO 2022. as long as they have an interest in Mathematics and adequate basic mathematical knowledge. Ultimately, the purpose of this competition is to help every student answer the age-old question: “Why study Mathematics?”.

In 2022, Fermat Mathematical Olympiad FMO takes place for the third time. In the previous seasons, the competition was a great success by having attracted the attention of many students from all over the world such as Thailand, Philippines, Bulgaria, Indonesia, Turkey, India, …. Following that success, with some alterations in the examination structure and the appearance of real-life problems, together with many valuable cash prizes, FMO 2022 promises to be an educational, interesting but also challenging mathematical playground for students. This is also a great opportunity for the participants to compete on a global scale and have memorable experiences. (sc: Facebook Fermat Mathematical Olympiad)

A. Warm-up
(4 points per question / No points deducted for wrong answers)

1. Tony has a square piece of paper. He folds it twice along the dashed lines and cuts the paper as in the picture below. How many pieces will he get after opening it?

A) 8

B) 9

C) 10

D) 11

E) 12

2. Tom can cycle at the speed of 20km/h and run at the speed of 12km/h. He takes part in a combined cycling and running race which lasts 56 minutes in total. If the cycling path and the running path have equal length, in how long does he cycle?

A) 21 min

B) 35 min

C) 28 min

D) 14 min

E) 42 min

A) 15π

B) 21π

C) 30π

D) 54π

4. Given that the same objects have the same weights, what is the heaviest object?

A)

B)

C)

D)

E)

5. Three siblings named Fermat (F), Euclid (E), and Pythagoras (P) have different heights. One day, they talk to each other:
Pythagoras: “I am not the tallest.”
Euclid: “I am the tallest.”
Fermat: “I am not the shortest.”
Only one of them says the truth. Can you list their height in order from the tallest to the shortest?
A) F, E, P
B) P, F, E
C) E, P, F
D) P, F, E
E) E, F, P

B. Speed-up
(6 points per question / No points deducted for wrong answers)

6. When practicing adding numbers, Jimmy didn’t write the last digit of a term. So, his result was 3698 instead of 33285. Let’s help him to find the digit that he didn’t write.

A) 3
B) 4
C) 5
D) 6
E) 7

7. Given 3 circles tangent to each other with center A, B, and C. If the perimeter of triangle ABC is 12, what is the area of the circle with center A?

A) 12π

B) 24π

C) 36π

D) 72π

E) 144π

8. From the pattern below, how many matchsticks do we need to build Figure 20?

A) 232

B) 244

C) 228

D) 224

E) 248

A) 90

B) 100

C) 105

D) 95

E) 110

10. Thomas has 133 Math questions. He does 2 questions more each day than the preceding day. In exactly a week, he finishes all questions. How many pages does he do on the second day?
A) 15
B) 13
C) 17
D) 14
E) 12

C. Challenge
(8 points per question / No points deducted for wrong answers)

11. Given a triangular prism whose base is an isosceles triangle. It is placed on a cuboid to get a combined figure as below. What is its total volume in cm3? (Note that the volume of a triangular prism is equal to the product of the area of the base and its height.)

A) 4736
B) 4032
C) 5376
D) 4608
E) None of the above

12. Father goes from home to the park, takes some rest then goes to Lucy’s summer camp to get her home. Given that the diagram below represents the father’s distance from home and the time he gets to each place. The average speed of the whole trip is 12km/h. How far is it from the home to the park?

A) 15km
B) 24km
C) 12km
D) 30km
E) None of the above