Circle name: Circle 12 05
Lesson name: Lesson4
Starts at : 13.05.2020 12:00
There are 6 locked suitcases and 6 keys for them. It is not known which keys are for which suitcase. What is the smallest number of attempts do you need in order to open all the suitcases? How many attempts would you need if there are 10 suitcases and keys instead of 6?
In the rebus in the diagram below, the arithmetic operations are carried out from left to right (even though the brackets are not written).
For example, in the first row “$** \div 5 + * \times 7 = 4*$” is the same as “$((** \div 5) +*) \times 7 = 4*$”. Each number in the last row is the sum of the numbers in the column above it. The result of each $n$-th row is equal to the sum of the first four numbers in the $n$-th column. All of the numbers in this rebus are non-zero and do not begin with a zero, however they could end with a zero. That is, 10 is allowed but not 01 or 0. Solve the rebus.
A traveller rents a room in an inn for a week and offers the innkeeper a chain of seven silver links as payment – one link per day, with the condition that they will be payed everyday. The innkeeper agrees, with the condition that the traveller can only cut one of the links. How did the traveller manage to pay the innkeeper?