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.
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Rotational Symmetry on Digital Clock
In the NPR Sunday Puzzle recently, the "weekly challenge" asked about what times on a digital clock (not using military i.e. 00-24:00 time) would read the same if the clock was turned upside ...
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What was the date of Michael's birth?
Michael was so obsessed with his birthday that he always held his birthday party on the exact date and time of his birth. But he didn't hold his birthday for 8 years (he held his 16th birthday and ...
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Twelve friends born on month ends
Twelve close friends were born on the last dates of their respective birth months. Fascinatingly, their birth months are different.
On 30th June 2023, all twelve of them had gathered for the birthday ...
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Entry and Exit of people in pizza delivery shop
Similar problem at: https://brainly.in/question/38234304
Five people went to a pizza delivery shop at different times on a Sunday morning.
They spent exactly 15 mins, 16 mins, 20 mins, 25 mins and 35 ...
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Clock hands get it Right
I was asked this question in an entrance exam.
In one day, how many times the hour hand and the minute hand of a clock are at right angles to each other?
My answer was 48. My reasoning was that during ...
user81177
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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.
...
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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 ...
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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 ...
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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, ...
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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 ...
user79541
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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 ...
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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 ...
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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, ...
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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 ...
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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....
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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:
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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 ...
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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 ...
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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 ...
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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 ...
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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'...
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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. ...
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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. :(
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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 ...
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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 ...
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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?
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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 ...
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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.
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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:...
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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
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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)?
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