Sales-Εκπτώσεις

Αυτή την περίοδο στην Ελλάδα έχουμε εκπτώσεις. Με δεδομένο το οικονομικό πρόβλημα της χώρας και της αγοράς, μπορεί μερικές φορές να βρούμε ένα προϊόν καλής ποιότητας σε χαμηλή τιμή. Έτσι αποφασίσαμε το πρόβλημα του μήνα να αφορά την περίοδο των χειμερινών εκπτώσεων.

Η Έλενα ήθελε να αγοράσει ένα φόρεμα για το γάμο της ξαδέρφης της. Της άρεσε πολύ ένα που βρήκε άλλα της φάνηκε ακριβό, 250 ευρώ. Ευτυχώς είχε εκπτώσεις και στη βιτρίνα του καταστήματος η ταμπέλα έγραφε 40% κάτω από την αρχική τιμή. Πόσο ήταν το ποσό της έκπτωσης; Πόσο πλήρωσε τελικά η Έλενα για το φόρεμα;

Αν ο μισθός της Έλενας είναι 800 ευρώ το μήνα, θα θεωρούσατε το φόρεμα φθηνό ή όχι;

These days it’s the sales period in Greece. Given the financial problems that the market faces we can find, in some cases, high quality products in low prices. Thus, we decided our math problem to be related with discount.

Elena wanted to buy a new dress because she was invited to her cousin’s wedding. She found a dress she really loved but it was quite expensive, 250 euro. Luckily it was sales period and the shop’s window had a big label “40% off the original prices”. How much was the discount? How much did Elena pay for the dress?

If Elena’s salary for the month was 800 euro, do you consider the dress’s price cheap or not?

6th grade, 13th primary school of Drama, Greece

Pedal bin

What shape is this pedal
bin?

Try to match the squares on
the floor with their reflections in the bin.

How many squares can you see
in two places: on the floor and reflected in the bin?

What happens to the straight
lines on the floor when they are reflected in the bin?

Tevfik İleri Anadolu Lisesi ,Rize,Turkey

Berlindes / Marbles

O Ricardo deu metade dos seus berlindes ao seu amigo Miguel, mas quando chegou a casa, a sua mãe tinha um saco com 25 berlindes para lhe oferecer. No dia seguinte, levou todos os seus berlindes para a escola e quando lá chegou reparou que, pelo caminho, tinha perdido 9 berlindes, uma vez que no seu saco já só tinha 18. Quantos berlindes tinha o Ricardo no início?



Ricardo gave half of his marbles to his friend Miguel, but when he got home, his mother had a bag with 25 marbles to offer him. On the following day, he took all his marbles to school and when he arrived he noticed that, along the way, he had lost 9 marbles, as in his bag he only had 18. How many marbles had Ricardo at the beginning?

Hair Dryer

Hair Dryer

The picture shows the
ventilation holes in a hair dryer.
There are 9 holes in the
first circle and 12 holes in the next circle. How does the pattern continue?
Try to figure out an answer
before counting the holes in the picture.
Figure out the total number
of holes without counting them.

Rize Tevfik Ileri Anadolu Lisesi ,TURKEY

Christmas Coded Message

4 M3RRY CHR157M4S 4ND A H4PPY N3W Y34R T0 4LL 7H3 FUN 4ND M47H P4R7N3R 5CH00L5!!

Wrapping Presents

A Maria está a embrulhar os presentes para os seus amigos e tem fitas azuis, verdes e amarelas. Ela tem também papel de embrulho laranja e encarnado. Quantas combinações de papel e fitas pode a Maria fazer?

Mary is wrapping the presents for her friends and she has blue, green and yellow ribbons. She has also orange and red wrapping paper. How many combinations of paper and ribbons can Mary do?

Christmas Ornaments

O Carlos tem oito anos e decidiu contar os seus enfeites de Natal e reparou que tinha bolas, anjos e estrelas de 5 pontas na sua árvore que perfaziam um total de 33 enfeites :
Então disse à mãe:
- Mãe na nossa árvore temos o mesmo número de bolas que a minha idade, o mesmo número de asas de anjos que a tua e o mesmo número de pontas de estrela que a idade da avó.

a) Que idade poderão ter a mãe e a avó do Carlos?
b) Quantas bolas, anjos e estrelas poderá ter a árvore do Carlos?

Carlos is eight years old and decided to count the Christmas ornaments on his tree and noticed that he had balls, angels and stars in a total of 33 ornaments like these:
Then he said to his mother:
- Mummy, on our tree we have the same number of balls than my age, the same number of angels' wings than your age and the same number of star edges than the age of grandmother.

a) How old could be the mother and the grandmother of Carlos?

b) How many balls, angels and stars may have Carlos' tree?

3rd Grade - Colégio Monte Flor - Portugal