Questões de EFAI Matemática

Victor was studying math and he saw a shape in his book he had never seen before:

Is the shape seen by Victor a quadrilateral? Choose the correct answer and explanation.

Raíssa and Raquel were analyzing two geometric shapes, a square and a rectangle. Each one made a statement:

Raíssa: “— Both the square and the rectangle always have four sides.”

Raquel: “— The difference between a square and a rectangle is the number of sides.”

Who said the correct statement?

Juliana was doing her homework. The task was to glue geometric shapes with a characteristic in common:

What characteristic is common to all the geometric shapes Juliana glued?

THIAGO AND HIS MOTHER ARE MAKING A CAKE. THE LIST OF INGREDIENTS INDICATE THE QUANTITY OF $650$ GRAMS OF FLOUR. TO MEASURE IT, THIAGO’S MOTHER ASKS HIM TO GET THE PROPER MEASURING INSTRUMENT.

WHICH OF THE INSTRUMENTS BELOW SHOULD THIAGO TAKE?

PEDRO HAS SEVERAL STICKERS IN A TRIANGLE SHAPE. OBSERVE HOW MANY STICKERS HE HAD UNTIL YESTERDAY:

TODAY PEDRO’S FATHER GAVE HIM MORE $12$ STICKERS.

HOW MANY STICKERS DOES PEDRO HAVE NOW?

A seller is putting the prices on his products before the street market starts. The last fruit missing is the watermelon. He put one fruit on the scale, as shown in the image:

Available at: https://www.shutterstock.com/pt/image-vector/weight-scale-watermelon-vector-illustration-2161384217. Accessed 7 Dec. 2022.

The scale showed the number $3$.

The most likely weight for this watermelon is