Question 1

How is the set A of natural numbers less than 5 and greater than 0 expressed?

Accepted Answer

A = {x ∈ N * | x < 5}

Answer

A = {x ∈ N * | x ≥ 5}

Answer

A = {x ∈ N | x < 5}

Answer

A = {x ∈ N | x ≤ 5}

Question 2

What is the GCD (Greatest Common Divisor) of 24 and 80?

Accepted Answer

8

Answer

4

Answer

2

Answer

6

Question 3

What is the least common multiple (LCM) of 15, 30, and 60?

Accepted Answer

60

Answer

120

Answer

15

Answer

30

Question 4

What number should replace * so that the result 711* is divisible by 9?

Accepted Answer

* ∈ {0; 9}

Answer

* ∈ {0}

Answer

* ∈ {0; 1; 9}

Answer

* ∈ {9}

Question 5

Which shape has one axis of symmetry?

Accepted Answer

Trapezoid

Answer

Parallelogram

Answer

Rectangle

Answer

Rhombus

Question 6

If a rhombus has diagonals of lengths 15 cm and 18 cm, what is its area?

Accepted Answer

135 cm²

Answer

75 cm²

Answer

270 cm²

Answer

33 cm²

Question 7

For the isosceles trapezoid ABCD with AB = 4 cm, BC = 5 cm, and CD = 9 cm, what is its perimeter?

Accepted Answer

23 cm

Answer

18 cm

Answer

21 cm

Answer

25 cm

Question 8

What is the sum of integer solutions x for the given equation -3<x<7 ?

Accepted Answer

18

Answer

16

Answer

12

Answer

14

Question 9

What is the result of the calculation 18 : (-3)² . 5?

Accepted Answer

10

Answer

12

Answer

8

Answer

14

Question 10

What is the result of the calculation

2020^{2023} : 2020^{2021}

?

Accepted Answer

$2020^{2023} : 2020^{2021}$

Answer

$2020^{2023} : 2020^{2021}$

Answer

$2020^{2023} : 2020^{2021}$

Answer

2020

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