Questões de EFAI Matemática

In a math competition, one of the stages consists of a memory game with equivalent fractions. After flipping a piece with a fraction, the player must choose another one that has an equivalent fraction to form a pair. In a given round, the player turned over the following piece:

What equivalent fraction could pair with the piece above?

Bruno, Caio, Denise and Estella love eating the cake their grandma bakes. The last cake she made, the four cousins ate the whole cake. Bruno ate $\frac{1}{5}$ of the cake, Caio ate $\frac{8}{25}$, Denise ate $\frac{7}{25}$ and Estella ate $\frac{2}{10}$ of the cake.

Who ate the same amount of cake?

Antônio owns a bakery and decided to distribute some sweets among four children who are always there. In total, he will share $20$ candies equally among them.

What fraction represents the amount each child will get out of the total sweets?

João bought a square chocolate bar divided into equal parts, as shown in the image below. The black color represents the number of chocolate squares that João has already eaten:

What fraction represents the part of chocolate eaten by João?

Paulo is a pastry chef and he is preparing a new chocolate cake recipe. For the filling, he took a bar of chocolate and divided it into equal pieces, as shown in the picture:

In his recipe, he used $5$ pieces in all.

What fraction represents the amount of chocolate used by Paulo?

Yasmin is studying symmetry in her math class. Her teacher asked her to get a square sheet of paper to cut it according to the instructions below.

Fold the paper in half.

Cut the paper in the indicated format using scissors.

Remove the piece that was cut.

Unfold the paper.

After unfolding the sheet of paper, what result will Yasmin get?