Sefer V'yesh Lomar is a sefer which consists entirely of Talmudic and Halachic riddles.
The last forty three pages of this sefer (in a section titled Vdibarta Bam) consists of over one hundred riddles whose answers are from the Talmud or Poskim. Here is some example:
*Where do we find that it is permissible to eat a certain food on Shabbat while on Motzei Shabbat it is forbidden to do so? (see Mesechet Dmai chapter 4, mishna 1).
*On which food does one make a bracha shehakol while the after bracha is a bracha me'ein shalosh? (see Mishna Beruara Siman 208, sief katan 73 or Mishna Berura 202, sief katan 42).
*What is the case that one person eats something permissible and gets the death penalty while someone else eats something forbidden and is excused from the death penalty? (see Sanhendrin 70a and you can work out the case).
Here is the contact info to buy the Sefer:
In Israel one can call Mispacha Dinar at 02-538-1479.
In England one can call 161-708-9745.
In the US one can call 1-718-677-1838
By the way - In the first four hundred and seventy pages of the sefer, there are three hundred and forty two iyun riddles. These are questions where a kushya is asked on the shita of one of the Rishonim or Achronim. The answers given are based on chilukim and svara.
Here is an example
(Question #35). The Mishna Berura writes (Siman 225 sief katan 11) that when one wants to make a shechiyanu on a new fruit it is better to first make the shechiyanu and then the bracha hanehenin in order in order that the bracha shechiyanu should not be a hefsek between the bracha on the fruit and eating it. Yet when it comes to making the bracha shechiyanu on a new talit the Mishna Berura writes (Siman 22 sief katan 103) that one first makes the bracha on the Tziztit and then shechiyanu. Five answers are brought to explain the difference.
