##### Introduction: comprobación de requisito previo

Enseñamos conceptos difíciles con las palabras más simples posibles. Vamos a corroborar que conozcas los términos y las ideas que se necesitan. Este curso es el correcto si obtienes al menos 80% en esta prueba, pero menos del 70 % de la place-out test

Tiempo restante:

10:00

1.

Calculate:

$(-2) \times (5 + 3 \times 3 - 20) + 4$

$-16$

$-8$

$0$

$8$

$16$

2.

What is $\frac{11}{6} - \frac{6}{4}$ expressed in simplest form?

$\displaystyle \frac{1}{2}$

$\displaystyle \frac{1}{3}$

$\displaystyle \frac{1}{4}$

$\displaystyle \frac{2}{3}$

$\displaystyle \frac{5}{2}$

3.

How many different ways are there to make an outfit with exactly one shirt and one pair of pants, if you have 3 different shirts and 4 different pairs of pants to choose from?

$3$

$4$

$7$

$12$

$24$

4.

What is the area of this triangle?

$17$

$25$

$30$

$34$

$60$

5.

Which of these is the prime factorization of 30?

$3 \times 10$

$5 \times 6$

$2 \times 3 \times 5$

$1 \times 2 \times 3 \times 5$

$30$ has no prime factorization

6.

If you pick one marble from a bag which has 3 red marbles and 7 blue marbles, what is the probability that you pick a red marble?

$\displaystyle \frac{1}{10}$

$\displaystyle \frac{3}{7}$

$\displaystyle \frac{3}{10}$

$\displaystyle \frac{4}{10}$

$\displaystyle \frac{7}{3}$