The moment we learn most in mathematics is when we apply our reasoning to logical challenges, which involve mathematical logic. Here you will have to carefully analyze the informed clues and fill in the report about each of the friends who are in the bank.
Challenge:
Three friends are at the ATM of a bank, they all have a bank account at this bank, with a certain amount of money. Your job will be to find out the full name of each of these friends and how much money they have.
CLUES:
1) The woman with the surname Martins has R$ 600.00 more than Renata.
2) The person whose last name is Oliveira has R$ 1100.00 in the bank account.
Once you have these clues, you will mark information that is true with a V and false information with an X.
We advise you to try the challenge before checking how it should be done.
Note that of the three friends, two are women and we have information about the two, one has the surname Martins and the other has the name Renata. See that this way we can already link the first and last name of one of the women and the money they have in our information table.
Remember the track, Martins has 600 reais more than Renata!
Please note that we do not mark any surname for the Renata, because we still don't know him. Now looking for the second clue, we will know which last name is responsible for the amount of BRL 1100.00. With that, only one surname will be left for the amount of BRL 600.00, gives Renata.
The person who has the surname Oliveira has R$1100 reais in the bank. As we already know the amount of money from the Mariana and of the Renata, we only have the Gabriel to relate to that money. And, thus, the surname Pereira will remain for Renata.
Copy this challenge into your notebook and take it to your friends at school, play with them and then teach them what the rationale should be for getting all this information with just two clues.
By Gabriel Alessandro de Oliveira
Graduated in Mathematics
Kids School Team
