All Tasks
The far bottom-left diagonal
In the spirale of numbers, what would be the 10th number on the bottom-left diagonal, completing 1, 9, 25, 49, 81, ...
# Operations with natural numbers
Reasoning
5
Order pizza
You and your friends want to order pizza. Your pizza is 3 Euros more expensive than Tim's. Justin's pizza is 4 euros cheaper than yours and Marcel's pizza is 1 euro more expensive than yours. In total you pay 44€.
How much do your pizzas cost each?
# Linear equations
Modeling
9
cube tower 2
Set up a term for the tower that can be used to determine the number of visible side faces as a function of the number of cubes.
# Terms with variables
Modeling
7
Which unknown is longer?
The total length of each track you see in the image is 30m.
Which of the variables x or y is longer? Fill in the blanks with the words longer or shorter and your calculated values.
# Linear functions
Reasoning
9
Chain rule arcsin
Let $f$ be a continuous function on $\mathbb{R}$ and $g$ the function $g(x)=\pi-\arcsin(3+2x)$. Knowing that $f\left(\pi\right)=0$ and $f'\left(\pi\right)=-1$, find the value of the derivative $\left(f\left(g\left(-\frac{3}{2}\right)\right)\right)'$.
# Functions of one variable
Training
13
Chain rule arcsin
Let $y=y(x)=\arcsin(2-3x)$ and $x=x(t)=e^{3t^2}$.
Use the chain rule formula to express the derivative $\left.\frac{dy}{dt}\right|_{t=0}$.
# Functions of one variable
Training
13