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The sum of the 10 first squares
Look at these pyramids. They are made of square pieces, all of the same height, which is the depth of each step. Hence their volume is the sum of the squares. You have six of them to make a cuboid. If there are ten stairs, what is the size of this cuboid made of the six pyramids?
# Monomials & polynomials
Modeling
8
The turning points
Now, let's turn our attention to the corners, the turning points, alternating bottom-left, top-left, top-right and bottom-right, beginning with 1, 2, 3, 5, 7...
# Operations with natural numbers
Reasoning
5
Altezza della ruota panoramica
La ruota panoramica Ain Dubai nel sistema di riferimento in figura ha equazione: $x^2+y^2-250y=0$.
Che altezza massima raggiungono dei visitatori che decidono di fare un giro su di lei?
(Il risultato trovato si considererà espresso in metri)
# Quadrics & conics
Modeling
11
Equivalent expressions
Which of the following expressions is equivalent to 3k+6?
# Numbers & operations
Reasoning
8
From natural to algebraic language
Translate the following sentence in algebraic language:
The square of an even number
# Numbers & operations
Training
8
Associative property for the sum
If a+b=9 then a+b+5=?
# Numbers & operations
Training
8