 #### The square

Written with this little fancy two up in the air, the square of a number is simply this number multiplied by itself. Compute the squares of the following numbers:

# Powers of integer exponent

Learning
6 #### The bottom-left diagonal

In the spirale of numbers, complete the sequence of numbers that appear on the bottom-left diagonal, starting from 1, then 9, then...

# Sequences

Training
5 #### Gauss stairs

The legend says that the young Carl Friedrich Gauss found a way to baffle his teacher by finding a way to sum all the integers between 1 and 100 in a matter of seconds. Do you know the answer?

# Sequences

Reasoning
5      #### Graphs f(x)=ax²

The graphs of the image correspond to the functions f(x)=-2x², f(x)=$\frac{1}{2}$x², f(x)=$\frac{-1}{3}$x² and 3x². How affects the quadratic coefficient to the graphs?

Training
8      #### Identifying translations from y=-ax²

From the green graph, corresponding to y=-ax² (a>0), obtain the equation of the blue graph and its vertex. One point of this graph is (1,-3) 