Đề thi toán tuổi thơ toàn quốc TH 2017

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C 2017

CHILDREN’S FUN MATHS JOURNAL NATIONAL COMPETITION 2017

ĐỀ THI CÁ NHÂN TIỂU HỌC

PRIMARY SCHOOL INDIVIDUAL PAPER

Thời gian: 30 phút (Duration: 30 minutes)

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Problem 1. The missing numbers in the boxes are of the same value.

What is the missing number?

Problem 2. Bain, Mary and Soha collected some toy cars. Bain had five times as many toy cars 
as Soha. Mary had twice as many toy cars as Soha. If Bain collected 99 more toy cars than
Mary, how many toy cars did the 3 children collect in total?

Problem 3. An ant is crawling from Point A to Point B 
down a staircase as in the figure.

How many meters will it need to crawl to reach Point B?

Problem 4. Beads are strung on a string in a pattern of two white beads followed by three 
black beads, and so on, as shown below.

What is the colour of the 37th bead?

Problem 6. What is the average of all the integers from 61 to 73, both numbers inclusive? 
Problem 7. On 1st

of March some years ago, one US dollar could be exchanged for 1.45
Singapore dollar. On the same day, 1000 Thai Baht could buy 50 Singapore dollar. How
many US dollars could 29 000 Thai Baht buy on that day?

Problem 8. Bain’s monthly salary is $7200. Every month, he spends 3

5 of his salary and
saves the rest. How much money will he save in half a year?

Problem 9. Compare the following fractions: 3232
4242 and

32
.
42

Problem 10. Arrange the following fractions from the smallest to the greatest: 1; 9 ;1.
7 56 8
Problem 11. What is the length of rectangle in the following figure?

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The diagrams are not drawn to scale 
Problem 12. The side of each small square in the figure is 5 cm.

Calculate the area of the quadrilateral ABCD.

Problem 13. Mary has a rectangular piece of paper measuring 30 cm by 20 cm. She folded 
the paper into halves two times (as shown in figure 1 below).

Mary then made two cuts each measuring 6 cm as shown in the figure below.

Find the remaining area of the paper in figure 2.

Problem 16. (Written paper/Tự luận)

Given a triangle ABC as in the figure. The length of AD =
length of DE = length of EB. The area of the triangle AFD is
50 cm2. If FB = FC, find the area of the triangle ABC.

Problem 14. A concrete path of width 5 m cuts 
across a rectangular park as in the figure. The
remaining area is to be planted with grass. Find the
area covered by grass.

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