Hello First Year students
Here you have the pre-exam we did this morning, I hope it helps...Remember that you are allowed to use the table.
Keep on working this afternoon and good luck.
When I was writing the title for this post I remembered a song, I hope you like it.
As we have already studied what GCF and lcm are, I would like you to go over the definition and improve in calculating both, so please, have a look to the following links:
Greatest Common Factor (GCF) is the highest number that divides exactly into two or more numbers.
Read more about GCF
Practice. More exercises.
Least Common Multiple (lcm) is the smallest (non-zero) number that is a multiple of two or more numbers.
Read more about lcm
Practice. More exercises.
PLAY A GAME
Practice with PROBLEMS
Another present: review the section Population figures from your English book, in case...
Are you studying for the exam on population pyramids? Here you have an exact model of the exam on Wednesday. If you want, you can practice, answer the interpretation questions and send them to me in a comment to correct them, ok?
Hola a todos! Estáis estudiando para el examen de pirámides de población? Aquí tenéis un modelo exacto de cómo será el examen del miércoles. Si queréis, podéis practicar, contestar a las preguntas de la interpretación y mandármelas en un comentario para que os las corrija, vale?
Anyway, remember the website where you can find the population pyramids of every country in the world. As a training for the exam, see as much as possible and try to guess the type.
De todas formas, recordad la página donde podéis encontrar las pirámides de población de cualquier país del mundo. Ved tantas como podáis y tratad de averiguar el tipo al que pertenecen, como entrenamiento para el examen.
Population pyramids website
It was created by Eratosthenes (275-194 B.C., Greece), an ancient Greek mathematician. Just as a sieve is a strainer for draining spaghetti, Eratosthenes's sieve drains out composite numbers and leaves prime numbers behind. The numbers from 1 to 100 are listed in a table. We will use The Sieve of Eratosthenes to find all primes up to the number 100 by following the directions below.
- Cross out 1 since it is not prime.
- Circle 2 because it is the smallest prime number. Cross out every multiple of 2.
- Circle the next open number, 3. Now cross out every multiple of 3.
- Circle the next open number, 5. Now cross out every multiple of 5.
- Circle the next open number, 7. Now cross out every multiple of 7.
- Continue this process until all numbers in the table have been circled or crossed out.
Questions (to be answered as a comment):
1. How many prime numbers are there from 1 to 100?
2. List all prime numbers from 1 to 100.
3. Which number is the only even prime number?
4. An emirp (prime spelled backwards) is a prime that gives you a different prime when its digits are reversed. For example, 13 and 31 are emirps. List all emirps between 1 and 100.
these days we have been working in class with surface area and volume of some geometric shapes. I leave you here some links to go over the most important ones:
Platonic solids (tetrahedron, cube, octahedron, dodecahedron, icosahedron)
Remember that you have to present by the end of this week your work including:
1. Description of your shape
3. Surface area and volume
4. Examples in real life
(Deadline: friday, 11th of november)
If you want to practice or get some ideas or pictures, you can find more exercises here:
Volume and surface area of sphere
Thank you very much for all the scary (and tasty) cakes you did.
Here you can see some sweet spiders, a terrific graveyard, some tasty pumpkins, a special skull, some funny bats and a cobweb... but there were more wonderful cakes. You have made an excellent work.