Decipher the quote from Philip Pullmans "His Dark Materials":
Erh csy wlepp orsa xli xvyxl, erh xli xvyxl wlepp qeoi csy jvii.
The same letters correspond to the same in the phrase, different letters correspond to different. We know that no original letters stayed in place, meaning that in places of e,r,h there was surely something else.
Decipher the quote from "Alice in Wonderland" from the following matrix:
Decipher the following quote from Alice in Wonderland:
Lw zrxog eh vr qlfh li vrphwklqj pdgh vhqvh iru d fkdqjh.
The same letters correspond to the same in the phrase, different letters correspond to different. We know that no original letters stayed in place, meaning that in places of e,r,h there was surely something else.
Elon is studying the Twitter server. Inside the software he found two integer variables
After mastering the Caesar shift cypher one may wonder how to generalize it. One possible way is to use Affine cypher. The difference between these two methods can be described as follows:
In case of Caesar cypher we took a letter with position
In case of affine cypher we take a letter with position
To decipher such code we need to know values
Does there always exist a number
Using data
Two expressions are written on the board:
Determine which one is greater or whether the numbers are equal.
Cut the "biscuit" into 16 congruent pieces. The sections are not necessarily rectilinear.
Bryn calls the date beautiful if all
In the middle of an empty pool there is a square platform of
For example, let’s consider the case when the heights of the towers are as given in the table on the right. Then at the water level of
Find out how Sunny should build his towers to get the following numbers of islands corresponding to the level of water in the pool:
In the solution, write down how many cubes are there composing a tower in each cell as it is done in the example.
The king possesses
The king reported his situation to his chancellor, pointing to one of the bags, and asked how to determine the weight of the coins in that bag. The chancellor has large two-cup scales without weights. These scales can precisely indicate whether the weights on the cups are equal or, if not, which cup is heavier. Can the chancellor ascertain which coins are in the bag indicated by the king, using no more than two weightings? The chancellor is permitted to take as many coins as necessary to conduct the weightings.