Math Club (Grade 7)

Given:

(i) A = {prime factors of 70}

(ii) B = {composite numbers less than 10}

(iii) C = {x | x ≤ 6, x ∈ prime numbers}

(iv) D = {x | 1 ≤ x ≤ 25, x ∈ square numbers}

Two sets considered as equivalent set are ...

• (i) and (iii)

• (ii) and (iii)

• (i) and (iv)

• (ii) and (iv)

Consider the following sets!

P = {0, 1, 3, 5}

Q = {2, 3, 6, 18}

n(P ∪ Q) = ...

• 5

• 6

• 7

• 8

In a class, there are 35 students, with 15 students do not like Algebra and 20 students do not like Fraction. If there are 10 students who like both Algebra and Fraction, then the correct Venn Diagram which represents the class condition is ...

• 
• 
• 
• 

The result of A ∩ B is ...

• { x | 2 ≤ x < 7, x ∈ even numbers }

• { x | 2 < x ≤ 7, x ∈ even numbers }

• { x | 2 ≤ x < 5, x ∈ even numbers }

• { x | 2 < x ≤ 5, x ∈ even numbers }

In December, Pyongyang’s temperature is –9^oC. In the same time, if Jakarta’s temperature is 27^oC, then the temperature’s difference of those city is ...

• 36^oC

• 18^oC

• -18^oC

• -36^oC

If a = −20, b = −15, and c = −5, then the value of a – 3b + 2c is ...

• -48

• -15

• 15

• 48

If a = 5, b = −6 , c = 4, then the result of a² − 2abc is ... .

• 265

• 250

• 230

• 215