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In search of Big Macs
Jon is an American guy who loves Big Macs. While on a trip around the world, he eats eight Big Macs: two in Germany, one in the United States, two in Switzerland, and three in India.
Assuming that the prices of the Big Mac are:
In Germany 3.59 €, in the United States 4.59 €, in Switzerland 5.99 € and in India 1.77 €.
a) What was Jon's total expenditure on Big Macs during his vacation?
b) If his flight was canceled, Jon would stay in the United States. In the United States, how much would he spend on the same number of Big Macs?
# Decimal fractions
# Units & rounding
Training
5
Proprietà distributiva nelle espressioni algebriche_2
Abbinare le seguenti espressioni algebriche:
1. 4(x-2)-3+x
2. 3(x-2)-(x-3)
3. -2(-x+2)+3(x+2)
4. -(x-2)+3(x-2)
alla sua espressione semplificata equivalente, scrivendo il numero dell'espressione a destra
# Terms with variables
Training
8
Granit prism
Calculate the volume of the granit block. Round the result in m³ to two decimal places.
# Cubes & cuboids
Training
8
Granit bench
Calculate the weight of the sitting part of a granit bench. The sitting part of the bench has the following dimensions: width 43 cm, height 13 cm, length 180 cm. The density of granit is 2600 kg/m³. Give the result rounded to the nearest whole in kilograms.
# Cubes & cuboids
Reasoning
8
Cobblestones
One cobblestone is a cube with the edge 8 cm long. How many of these cobblestones fit to one cubic meter? Give the result as a whole number.
# Cubes & cuboids
Modeling
8
A problem of one euro
A 1 euro coin is made of a bimetallic layered composition: cupronickel for the silver part (internal) and brass for the gold part (external).
The euro has a 23.25 mm diameter.
What is the radius of the inner circumference if the distance between the golden (outer) and silver (inner) circumferences is d = 3 nm?
# Circle
Training
5
