Đề thi FMO mùa hè 2021 Khối 4 (Kèm đáp án)

 FMO - Grade 4 
 A. Warm-up (4 points per question / No points deducted for wrong answers) 
1. Which figure should be filled into the cell with the question mark? 
 A) B) C) D) E) 
2. Mr. Lee has a garden. He plants vegetable on of the garden; builds a pond on of the 
 remaining land. Finally, he builds a path on the rest. Given that the area of the path is 
 30m2, find the area of the garden. 
 A) 90 m2 B) 60 m2 C) 36 m2 D) 80 m2 E) 120 m2 
3. Find the value of given that  is the smallest 3-digit odd number. 
  - 2  x 3  + 4  : 5   
 A) 167 B) 170 C) 165 D) 169 E) 70 
4. A pattern on a wall was created with 2 kinds of tiles: Grey and stripped so that tiles of 
 the same type cannot be placed next to each other. Some tiles have fallen off the wall 
 as in the picture to create a white region with perimeter 90cm. Find the total area (in 
 cm2) of all the grey tiles which have fallen off. 
 A) 225 B) 200 C) 175 D) 150 E) 125 
 1 
 FERMAT Mathematical Olympiad Summer 2021 
 All materials on the test are copyrighted and owned by Fermat Education 
9. Each cell has side length 1cm. Find the total area of 4 shapes below in cm2. 
 A) 44 B) 43 C) 41 D) 40 E) 42 
10. Teacher gives presents to each student one in 2 types of gift boxes: One with 2 pens 
 and 3 books; the other with 5 pens and 1 book. Given that teacher has 17 pens and 
 there are 7 students in the class. How many books does the teacher have? 
 A) 15 B) 19 C) 6 D) 21 E) 8 
 C. Challenge (8 points per question / No points deducted for wrong answers) 
11. Candace glued 25 white blocks together and painted all the surface in red (except for 
 the bottom). How many cube faces have been painted? 
 A) 74 B) 79 C) 82 D) 70 E) 86 
12. A box contains 10 red, 5 green, 6 blue and 14 black balls. Ally wants to get 4 balls of 
 different colors but she cannot look into the box. What is the minimum number of 
 balls she should pick to be sure? 
 A) 29 B) 30 C) 31 D) 32 E) 33 
 3 
 FERMAT Mathematical Olympiad Summer 2021 
 All materials on the test are copyrighted and owned by Fermat Education