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KSF 2019 - Problems PreEcolier (Class 11 & 12)

Giảng viên: Thầy Bá Phong

01:15:00

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Question 1 |

True: +3 False: -1

The flag of Kangoraland is a rectangle which is divided into three smaller equal rectangles as shown. What is the ratio of the side lengths of the white rectangle?

A.

1: 2

B.

2: 3

C.

2: 5

D.

3: 7

E.

4: 9

Question 2 |

True: +3 False: -1

The numbers 1, 2, 3 and 4 are each written in different cells of the 2 × 2 table. After that, the sum of the numbers in each row and column is calculated. Two of these sums are 4 and 5. What are the other two sums?

A.

6 and 6

B.

3 and 5

C.

4 and 5

D.

4 and 6

E.

5 and 6

Question 3 |

True: +3 False: -1

A rectangle has been shaded in five different ways as shown. In which diagram does the shaded part have the largest area?

A.

B.

C.

D.

E.

Question 4 |

True: +3 False: -1

Three triangles are linked as shown. Which of the following pictures shows these three triangles linked in the same way?

A.

B.

C.

D.

E.

Question 5 |

True: +3 False: -1

A pyramid has 23 triangular faces. How many edges does this pyramid have?

A.

23

B.

24

C.

46

D.

48

E.

69

Question 6 |

True: +3 False: -1

The following sketches suggest right-angled triangles. Which one is indeed right- angled?

A.

B.

C.

D.

E.