#### Exercise with a number to the power of an x value

In the following sum the power is $x$. Can you determine what the $x$ value is? $2^2+5^2+3^{x} = 30$

# Powers

Reasoning
8

#### Animals at the zoo

The graph represents the percentages of the different groups of animals in a zoo. It is known that there are 5 animals of the category "Others" in the zoo. How many animals are there in the zoo?

# Standard diagrams

Modeling
8

#### A Bag with balls of different colours

A bag contains only 10 red balls, 5 green balls and 5 blue balls. If we take one ball out of the bag at random, we can say that:

# One-stage random experiments

Training
8

#### Graphic representations of fractions

How would you draw the fraction $\dfrac{5}{4}$?

# Fractions

Reasoning
6

#### Fractions as part of a whole

Look at the pictures and fill in the blanks.

# Fractions

Learning
6

#### Asymptotes of the exponential function

Considering the function $f(x)=a^x$, it's true that

# Logarithmic function

Learning
10