Here is a concise summary of the provided text:
**Title:** Solve Detective Riddles
**Format:** A video presents 5 detective riddles, giving viewers 15 seconds to solve each before revealing the answers.
**Riddles Summarized:**
1. **Jailbreak Jack**: Escape a cell with a shovel, dirt floor, and high window. **Answer:** Use shovel to make a dirt pile, climb, and escape.
2. **Stolen Necklace**: A woman reports a stolen necklace with no signs of break-in, but one broken window and a messy house. **Answer:** The window was broken from the inside, indicating the woman (Mrs. Smith) was responsible.
3. **Murder at School**: A geography teacher is murdered on the first day of school, with four suspects having alibis. **Answer:** The math teacher, whose alibi (holding a mid-year test) didn't match the day of the event (first day of school).
4. **A Lonely Man**: A mailman finds a lonely old man dead in his house with a specific arrangement of milk bottles and a newspaper. **Answer:** The killer was the mailman, who knew the victim's schedule and chose a specific day to commit the crime.
5. **Three More Riddles with Brief Summaries:**
* **Two Pills**: A serial killer's trick involves poisonous water, not pills.
* **Frozen Windows**: A man is arrested for murder after claiming to have discovered the body through a frozen window, which he couldn't have done if it were truly frozen (ice forms inside).
* **Chemical Substances**: A chemist's murderer is identified through a note with chemical symbols that, when combined, spell out the killer's name (Nicholas).
Here are the key facts extracted from the text, keeping each fact as a short sentence and excluding opinions:
**Riddle 1: Jailbreak Jack**
1. A prisoner named Jack is in a cell with a dirt floor and a high, unreachable window.
2. The cell is empty except for a shovel.
3. Jack has only two days to escape or he will die.
4. The solution involves using the shovel to escape through the window.
**Riddle 2: Stolen Necklace**
5. Mrs. Smith reported her vintage necklace stolen to the police.
6. There were no signs of a break-in, except for one broken window.
7. The police found a messy house with dirty footprints.
8. Mrs. Smith was arrested for fraud the next day.
9. The reason for her arrest was that the window was broken from the inside.
**Riddle 3: Murder at School**
10. A geography teacher was murdered on the first day of the school year.
11. Four suspects were identified: the gardener, math teacher, coach, and principal.
12. Each suspect had an alibi for the time of the murder.
13. The killer was the math teacher, whose alibi was proven false.
**Riddle 4: Lonely Man**
14. A lonely old man was found dead in his house by a mailman.
15. The police found Tuesday's newspaper and bottles of warm and cold milk.
16. The killer was arrested the next day.
17. The mailman was the killer, who knew the house's occupant wouldn't read the newspaper mid-week.
**Riddle 5: Two Pills**
18. A serial killer gave victims two pills, one harmless and one poisonous.
19. The killer took the opposite pill of their victim.
20. The poisonous substance was actually in the water, not the pills.
**Riddle 6: Frozen Windows**
21. John found his friend dead in the friend's house on a cold winter day.
22. John claimed he was just passing by and had been knocking and ringing the bell.
23. The police arrested John, who hadn't thought through his alibi.
24. The window was frozen on the inside, making John's breath-test impossible.
**Riddle 7: Chemical Substances**
25. A famous chemist was murdered in his lab with no evidence except a note with chemical substances.
26. The chemist had three visitors that day: his wife Mary, nephew Nicholas, and friend Jonathan.
27. The police arrested the murderer based on a clue in the note.
28. The note contained a hidden name: "Ni C O L A S" (Nicholas).