Đề HKIMO Vòng chung kết quốc gia 2020 Khối 2 (Có đáp án)

Đề HKIMO Vòng Chung kết Quốc gia 2020 – Khối 2 
 Logical Thinking 
1. According to the pattern shown below, what is the number in the blank? 
 Pattern: Dãy theo quy luật; Number: số; Blank: Chỗ trống. 
 14 、 18 、 23 、 29 、 36 、 44 、 __ 、. 
2. According to the pattern shown below, what is the English alphabet in the 
 space provided? 
 Space: Khoảng trống. 
 Z 、 y、 X 、 x 、 V 、 w 、 T 、 __ 、. 
3. Mary needs 30 minutes to finish an exercise and rest for 5 minutes. How 
 many minute(s) does Mary need to finish 4 exercises? 
 Minute: Phút. 
4. If 16th May, 2020 is Saturday, which day of the week will 19th August, 2020 
 be? 
 May: Tháng Năm; Saturday: Thứ Bảy; Day of the week: Thứ trong tuần. 
5. According to the pattern shown below, how many ＊ is / are there in the 9th 
 group? 
 Pattern: Dãy theo quy luật. 
 ＊ ＊ ＊ 
 ＊ ＊ 
 ＊ ＊ ＊ ＊ 
 ＊ ＊
 ＊ ＊ ＊ 
 ＊ 
 ＊ ＊
 1st Group 2nd Group 3rd Group 4th Group 
 Arithmetic 
6. Find the value of 346 218 269 352 104 311. 
 Value: Kết quả. 
7. Find the value of 17 71 34 43 69 96 . 
 Value: Kết quả. 
 1 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education. 
15. The numbers below follow the arithmetic sequence, what is the 10th number? 
 Arithmetic sequence: Dãy số cách đều. 
 266、254、242、230、218、 
 Geometry 
16. A pyramid has 8 faces, how many edge(s) does this pyramid have? 
 Pyramid: Hình chóp; Face: Mặt; Edge: Cạnh. 
17. At least how many square(s) can be seen if viewing the figure below from 
 the top? 
 At least: Ít nhất; Square: Hình vuông; The top: Phía bên trên. 
18. How many line segment(s) is / are there in the polygon below? 
 Line segment: Đoạn thẳng; Polygon: Đa giác. 
19. How many interior angle(s) is / are there in the polygon below? 
 Interior angle: Góc trong; Polygon: Đa giác. 
 3 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education. 
Đề tham khảo số 1 – Khối 2 
 Logical Thinking 
1. If the day before yesterday was Tuesday, which day of the week will 4 days 
 later be? 
 The day before yesterday: Ngày hôm kia. 
2. 17 children form a line. There are 9 people in front of Amy. What is her 
 position counting form behind? 
 Line: Hàng; In front of: Phía trước; Behind: Phía sau. 
3. According to the pattern shown below, what is the number in the blank? 
 2 、 6 、 12 、 20 、 30 、 42 、 __ 、. 
 Pattern: Dãy theo quy luật. 
4. John goes to school by bus and he needs to pay $5 a day. How much does he 
 have to pay if he goes to school and goes back home a week by bus? 
 Week: Tuần. 
5. According to the pattern shown below, how many  is / are there in the 13th 
 group? 
 Pattern: Dãy theo quy luật. 
   
      
        
    
  
 1st Group 2nd Group 3rd Group 4th Group 
 Arithmetic 
6. Find the value of 3 13 23 33 7 17 27 37 . 
 Value: Kết quả. 
7. Find the value of 45 6 27  6 . 
 5 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education. 
 Geometry 
16. How many square(s) is / are there in the figure below? 
 Square: Hình vuông. 
 Question 16 
17. A prism has 12 edges, how many vertice(s) does this prism have? 
 Prism: Hình lăng trụ; Edge: Cạnh; Vertices: Đỉnh. 
18. According to the pattern shown below, what is the figure in the space 
 provided? 
 Pattern: Dãy theo quy luật; Figure: Hình. 
 △ □ ○ ○ △ △ □ ○ ○ △ △ □ ○ ○ _ △ 
 Question 18 
19. At least how many square(s) can be seen if viewing the figure below from 
 top? 
 At least: Ít nhất; Square: Hình vuông; Top: Phía bên trên. 
 Question 19 
20. At most how many line(s) can be formed by using 4 points on a plane? 
 At most: Nhiều nhất; Line: Đường thẳng; Point: Điểm; Plane: Mặt phẳng. 
 Combinatorics 
21. After Amy gives 6 candies to Andy and 4 candies to Johnny, they will have 
 equal number of candies. How many candy(s) did Amy have more than 
 Johnny originally? 
 Equal: Bằng nhau; More than: Nhiều hơn. 
22. What is the smallest 4-digit number by using 3, 5, 7 and 0 that is divisible by 
 5? (Each number can only be used once) 
 Smallest: Nhỏ nhất; 4-digit number: số có 4 chữ số. Divisible by: Chia hết. 
 7 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education. 
Đề tham khảo số 2 – Khối 2 
 Logical Thinking 
1. According to the pattern shown below, what is the number in the blank? 
 Pattern: Quy luật; Blank: Chỗ trống. 
 8 、 10 、 14 、 20 、 28 、 38 、 __ 、. 
2. If the day after tomorrow will be Wednesday, which day of the week will 5 
 days later be? 
 The day after tomorrow: Ngày kia; Later: Sau đó. 
3. 30 children form a row. Alice is the 11th starting from the front. What is her 
 position counting form behind? 
 Row: Hàng ngang; The front: Phía trước; Behind: Phía sau. 
4. Alice needs 10 minutes to finish a lap. Then she needs to rest 1 minute. How 
 many minute(s) does she take to finish 10 laps? 
 Minute: Phút. 
5. According to the pattern shown below, how many ◎ is / are there in the 9th 
 group? 
 Pattern: Quy luật. 
 ◎ ◎ ◎ ◎ 
 ◎ ◎ ◎ ◎ ◎ ◎ 
 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ 
 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ 
 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 
 ◎ ◎ ◎ 
 ◎ ◎ 
 1st Group 2nd Group 3rd Group 4th Group 
 Arithmetic 
6. Find the value of 1 3 5 7 9 111315 . 
 Value: Kết quả. 
7. Find the value of 3 3 6 2 9 1 18 2. 
 9 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education. 
 Geometry 
16. How many square(s) is / are there in the figure below? 
 Square: Hình vuông; Figure: Hình. 
 Question 16 
17. A prism has 16 faces, how many vertice(s) does this prism have? 
 Prism: Hình lăng trụ, Vertices: Đỉnh. 
18. By observing the pattern, what is the missing figure? 
 Observe: Quan sát; Pattern: Quy luật; Missing: Thiếu. 
 ■、▲、★、★、■、▲、★、★、■、？、★、★、■、▲、★、 
 Question 18 
19. At least how many square(s) can be seen if viewing the figure below from 
 the top? 
 At least: Ít nhất; Square: Hình vuông; The top: Phía bên trên. 
 Question 19 
20. At most how many line(s) can be formed by using 6 points on a plane? 
 At most: Nhiều nhất; Line: Đường thẳng; Point: Điểm; Plane: Mặt phẳng. 
 Combinatorics 
21. After Alice gives 8 pencils to Peter and takes 6 pencils from Mary, they will 
 have equal number of pencils. How many pencil(s) did Mary have more than 
 Peter originally? 
 Equal: Bằng nhau; More than: Nhiều hơn. 
22. What is the greatest 4-digit number by using 2, 4, 6 and 8 that is divisible by 
 4? (Each number can only be used once) 
 11 
KỲ THI OLYMPIC TOÁN HỌC QUỐC TẾ HKIMO 2021 – 2022 
Đơn vị đồng tổ chức tại Việt Nam: Trường Đại học Thủ Đô Hà Nội và FERMAT Education.