sábado, 17 de junio de 2017
miércoles, 7 de junio de 2017
martes, 23 de mayo de 2017
martes, 16 de mayo de 2017
miércoles, 3 de mayo de 2017
martes, 18 de abril de 2017
viernes, 3 de marzo de 2017
viernes, 24 de febrero de 2017
jueves, 9 de febrero de 2017
A TABLE AND TWO CHAIRS
What is the height of the table?
miércoles, 1 de febrero de 2017
miércoles, 18 de enero de 2017
martes, 10 de enero de 2017
The students of the IES Don Bosco are going to make a Christmas Tree using recycled materials. The idea is to make round cardboard trays and to fill them with cans (soft drinks, beer, …). The height of the tree is 216 cm.
The height of a can is 11.5 cm and the thickness of the trays is 5 mm. How many trays will they need to make this tree?
The radius of the top tray is 9.5 cm and the radius of the bottom tray is 69 cm. If the difference between the radiuses of two consecutive trays is always the same, what will be that difference and what will be the radius of each tray?
The sequence of these radiuses is a particular type of sequences. Could you find out the name of these sequences?