Questions tagged [time]
Puzzles which include the concept of time, as for instance: clocks, dates, calendars, conversions from one time zone to another, time-intervals.
121
questions
-1
votes
2
answers
61
views
At what time did John arrive home?
John has quite a curious clock at home. Every hour it rings a bell as many times as the number of hours (At 2 o´clock it rings twice, at 3 o´clock thrice and so on), and it rings only once at a ...
2
votes
1
answer
197
views
Eating my toasts before work
I work remotely as a software engineer, and because I like sleeping as much as possible I always leave my alarm clock set to the last possible minute. Problem is, today I did not hear my alarm go off, ...
-6
votes
0
answers
40
views
How late will he be? [duplicate]
I'm struggling with a puzzlein Swedish. I'll provide a translation for you.
Here's the puzzle:
A person had arranged to meet a friend at 0945. The person's wristwatch was ten minutes behind the ...
- 111
18
votes
1
answer
3k
views
Are there seven consecutive annual dates which result in Monday-Sunday?
Choose a date that's a Monday, e.g. 1st Jan 2024. Then keep adding 1 year until you have seven dates in a row that are the days of the week in order (Monday to Sunday).
Does such a date combination ...
- 4,665
17
votes
1
answer
851
views
Time (and a place) for an odd-one-out puzzle
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
It is a tough task to create an 'odd-one-out' type puzzle whose solution lacks any ambiguity at all - it is all ...
- 117k
13
votes
1
answer
863
views
Horological Horrors
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
I was visiting my grandfathers workshop one day, when he received a call and had to run out for a bit. He told ...
- 6,000
2
votes
1
answer
369
views
Another predictable sequence: 1, 1, 2, 2, 1, 17, etc
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
Can you find the pattern? Note: The next number hasn't been worked out yet.
...
- 2,459
21
votes
1
answer
3k
views
Time to get a watch
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
Last weekend I caught up with a friend I hadn't seen in a while. I went round his house on the Friday night ...
- 117k
18
votes
2
answers
745
views
Only time will tell
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
Please help. I'm an intelligence officer, and I've got a crisis on my hands - my boss has gone missing! I came ...
- 117k
3
votes
1
answer
314
views
Blind Date and Times
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
I was going on a blind date with a fellow puzzler and they sent me this:
I didn't end up going on the date, ...
- 955
0
votes
0
answers
118
views
Thyme and thyme again (Shakespearean, pronounced “ah-GAI-n”
“A missing right parenthesis gives a sense of suspense.” - A paraphrase of Randall Munroe
You awaken to a series of images flashing faster than your eyes can comprehend, and yet they can, lending the ...
- 1,235
30
votes
3
answers
1k
views
A Ticking Time Bomb
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
You wake up, finding yourself sitting in a room you've never seen before. Around the room there are loads of ...
- 3,075
0
votes
1
answer
149
views
Measure time with 2 ropes [duplicate]
You are given two ropes that when lit burn in one hour. Which one of the following time periods CANNOT be measured with your ropes? a) 50 min b) 30 min c) 25 min d) 35 min.
I know 30 minutes is ...
4
votes
2
answers
367
views
Dark time in prison
You wake up. It is pitch dark. You don't know where you are. You feel groggy.
The last thing you remember is being in a bar, a sexy young woman appeared out of nowhere, walked straight at you, ...
- 24.9k
1
vote
0
answers
120
views
I wonder what that would be
This is my own puzzle.
Consider the following
Alice begins march for peace in East Bengal along with Gandhi
Bentley celebrated the first Bahia Independence Day
Catherine saw the starting of the Great ...
- 1,565
3
votes
1
answer
330
views
A strange corporate
The employees of corporate "Clocks" have a fixed rule for working hours. All the employees start working at 16:00 and finish their work by 21:00. They take exactly one break during that time....
- 1,270
3
votes
2
answers
315
views
What time is it? (High School Logic Question)
You need to find out what time it is.
The logic question allegedly asked of middle school children in Russia.
I think the question has more than one answer. So to clear my confusion, I will ask you to ...
4
votes
1
answer
290
views
A prime time traveler
It is the year 2140 and you have just turned 40. After years of research, you have finally invented the time machine! It is a small device that fits in your pocket and allows you to travel in time. ...
- 28.8k
1
vote
1
answer
151
views
Zettler's Encyclopedia
On epiphany 1735, Sir Zettler, who was a great publisher from the old continent, promised to issue a "Great Universal Encyclopedia of Collectible Wisdom". It was meant to be affordable for ...
- 555
-3
votes
3
answers
188
views
Twisted Timekeeping [closed]
Two office workers need to arrive at work at the exact same time. However that's not likely to happen because the only thing they use for telling the time is their watches and their timekeeping is a ...
- 173
4
votes
3
answers
267
views
Doing Time In Prison
A prisoner was awoken by an earthquake that caused his wall clock to fall to the floor and rolled in the corner of his cell. When the ground stops shaking, he learns that the clock is still working ...
- 6,616
1
vote
1
answer
206
views
Puzzle storm to infinity
I have been playing Puzzle Storm on Lichess lately. Essentially it involves solving chess puzzles within a given time limit. Additionally, the player gets a time bonus for a certain number of moves. ...
- 21
3
votes
2
answers
207
views
On which date was Marina born?
The puzzle is as follows:
In 2012, which began on a Sunday, Marina was happy because her birthday was on a Saturday and she celebrated it with her friends. We know, Marina was born in a year where ...
- 1,495
0
votes
0
answers
97
views
Nine touching clocks [duplicate]
There are nine 12-hour clocks arranged in a 3x3 grid, as shown in the diagram. The long minute handles of the left two clocks are touching, while the others are not. Two minute handles touch if they ...
- 28.8k
9
votes
1
answer
1k
views
Four touching clocks
There are four 12-hour clocks arranged in a 2x2 grid, as shown in the diagram. The long minute handles of the left two clocks are touching, while the others are not. Two minute handles touch if they ...
- 28.8k
2
votes
1
answer
350
views
What is the date displayed for the question mark?
Someone sent me these images. It's about the Moon for some reason. Anyways, here are the images:
And also that someone gave me a bonus:
- 29
3
votes
1
answer
139
views
An altered Alan Parrish question
I was wondering around on Puzzling when I saw this question posted three days ago.
It is a great puzzle and it reminded me me about another puzzle a saw a long ...
- 2,253
6
votes
1
answer
249
views
When is the full moon?
During each lunar cycle, the full moon is technically full for one instant, but to the human observer, the moon appears full for 2-3 days and nights in a row, making it hard to tell on which date and ...
- 5,714
10
votes
1
answer
367
views
The Alan Parrish question
Two stereotypical british gentlemen that don't know each other engage in this unusual conversation (it's almost as if they were a setup for a puzzle):
Gentleman A - Hello sir, I'll have you know that ...
- 12.6k
15
votes
1
answer
612
views
Explain this holiday calendar oddity
Happy Boxing Day! Yesterday was Christmas Day, and in a few days, it will be New Year's Day. Each holiday season, those two holidays are always on the same day of the week (in this case, Friday). But ...
- 5,714
3
votes
3
answers
268
views
After how many minutes will both hour hand and minute hand lie on one another
The following question was part of my mock test and I was unable to solve it.
Assuming that:
A: The hour hand and minute hand of the clock move without jerking
B: The clock shows a time between 8 o'...
- 679
14
votes
0
answers
596
views
Qubes: Oh, For the Love Of
TL;DR: This is a mixture between a tribute/spin-off puzzle and an attempt at a new puzzle type, greatly inspired by the notorious arcade game, Q*bert, published originally by Gottlieb Amusement Games. ...
- 792
5
votes
3
answers
2k
views
But wait! We skipped a day!
Today is October 4th and tomorrow will be October 6th. Explain!
Note: I just thought of this one day and decided to post it here. Please don't leave too many downvotes. :(
- 3,077
13
votes
3
answers
2k
views
A stopped watch shows correct time ---
You know the old saying
A slow or fast running watch is worse than a stopped (broken) watch. At least the stopped watch shows correct time twice a day!
Here is a challenge:
A person was wearing a ...
- 39k
3
votes
1
answer
200
views
Lazy Box Sorting
In front of Louis there are 10 boxes containing different foods: tomatoes, (red) herrings, and bananas.
The boxes are arranged side by side in a line. Right next to the last box are three bigger ...
- 311
6
votes
5
answers
1k
views
Probability of three identical digits on a four-digit digital clock?
On a digital clock showing 00:00 to 23:59, what is the probability of having exactly three identical digits?
- 11.8k
16
votes
1
answer
580
views
The Odd Street Clocks
The clockmaker took a walk after a lunch from a restaurant and across the block corner he found the old clock box with four similar looking clocks on every wall. It is in the middle of the street ...
- 6,616
1
vote
2
answers
184
views
Measure nine minutes with two hourglasses [duplicate]
How can you measure 9 minutes with a 7-minute hourglass and a 4-minute hourglass?
Note: In this question it states where it's possible or not but not the actual procedure for this exact situation.
- 267
7
votes
2
answers
473
views
Puzzle - Counting Lights, Not Sheep
Some nights it is difficult to get to sleep. On one such night, John counted the
number of LEDs (Light-Emitting Diodes) on his clock radio that was on to make
each individual time from 10:00 PM to 12:...
- 477
-1
votes
1
answer
178
views
A sensitive lent
The number of days from the first day of Lent to the last day, inclusive, may be best described by:
a) XL
b) Xl + VI
- 69.3k
26
votes
1
answer
1k
views
Using burning ropes as timer - how to measure 1 hour and 8 minutes with 3 ropes?
This is a variation of a well known puzzle, you can find the other versions on PSE.
You have three ropes and a box with ten matches.
As usual each rope takes one hour to burn completely when lighted ...
- 5,052
-4
votes
3
answers
165
views
Previous palindrome date
2nd of February this year will be a palindrome date, because 02/02/2020 reads the same forwards and backwards. But when was the previous palindrome date?
- 28.8k
5
votes
1
answer
254
views
Why do I celebrate later? (still 13,37 years)
A very little time ago, just a bit ago one may say, people started partying. Some even went out of their houses to do so… crazy thing, IMHO.
Anyway, I don't, I'll start partying in 4886 days.¹
Why do ...
- 215
4
votes
1
answer
375
views
Using burning ropes as timers
This puzzle is an harder version of a very famous one.
It has been asked many times on PSE, but this time the question is slightly different (1) (2). So please read this question twice before marking ...
- 5,052
1
vote
1
answer
127
views
Date from 2 wooden cube puzzle [duplicate]
In an interview the interviewer asked me a question based on date.
Suppose in a office, at the manager's desk there are 2 wooden cubes to show the date of month, every day the manager sets the cubes ...
- 113
6
votes
7
answers
4k
views
If the second hand goes backwards, starting from 12:00, how long does it take to meet with the minute hand?
If the second hand of a clock goes backwards, starting from 12:00, how long does it take until it meets with the minute hand (which is going forwards)?
- 87
0
votes
2
answers
1k
views
Witches' Coffee [closed]
Two witches make a nightly visit to an all-night coffee shop. Each arrives at a random time between 0:00 and 1:00. Each one of them stays for exactly 30 minutes. On any one given night, what is the ...
3
votes
1
answer
269
views
Infinite dials to reset ever?
I have an infinite number of dials with red needles that rotate $n\in\mathbb{Z^+}$ times every second. They all start pointing North.
Will they simultaneously all point North ever again?
- 35.4k
6
votes
2
answers
1k
views
What's Bob's age again?
I created this problem myself, but I did have inspiration.
Today is a special day, I'm moving out of my parent's house. My father comes to me and says "Wow, you're half my age. On the day we moved ...
- 2,943
-1
votes
1
answer
160
views
When was Sia born? [closed]
John was born on 15 August 2007. If Sia is 17 year older than John. On which day Sia was born?
Tuesday, Wednesday, Monday, Friday
user57041