To Index"
Time flies like an arrow -- fruit flies like a banana."| 1. Exactly how many minutes is it before six
o'clock if 50 minutes ago it was four times as many minutes past three o'clock?
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Answer 19 |
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| 2. How many palindrome TIMES does a digital clock display in a day when it has a three-digit display (0:00) and how many when the clock has a four-digit display (00:00)? | Answers 19 |
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| 3. A few times per day, the minute hand of a clock
is exactly above (or below) the hour hand. How many times per day does this occur?
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Answer 19 |
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| 4. A friend of mine invented a new clock. It times
an entire day in 10 hours, each hour in 100 minutes and each minute in 100 seconds. What
time is it when it reads 5:41?
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Answer 19 |
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| 5. You have the misfortune to own an unreliable clock. This one gains exactly 15 minutes every hour. It is now showing 2:00pm and you know that it was correct at midnight, when you set it. The clock stopped 7 hours ago; what is the correct time now? | Answer 19 |
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| 6. A clock with a sweep second hand is set with
all three hands aligned at Noon, and the clock is started and run until Midnight. During
the 12-hour period given, when were the three hands of the clock aligned with each other?
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Answer 19 |
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| 7. The clock in the church tower takes seven seconds to strike 7 o'clock. How long will it take to strike eleven o'clock? | Answer 19 |
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| 8. What common event occurs regularly every 65 minutes 27.3 seconds? | Answer 19 |
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| 9. One day I passed through the bedroom and noticed the time on my digital clock. When I came back an hour later, give or take 5 minutes, I saw to my surprise that the time displayed was the same as it was when I saw it earlier. When I mentioned the strange occurrence to my wife, she told me that she had flipped the clock over half an hour ago, because it was upside-down. My clock works fine, but it doesn't display the colon marks ":" That's why it didn't look abnormal when I saw it earlier. What time was it the first time I saw the clock? What time did I see on both occasions? Since there are several possibilities, can you find all the possible solutions that could have been displayed? | Answer 19 |
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| 10. A man has three sons. He gave one son 10
cents, and the other sons 5 cents each. What time is it?
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Answer 19 |
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| 11. A man in Florida decided to call a friend in
Oregon. They talked for a bit, and in conversation the man in Florida mentioned what time
it was. The man in Oregon said, "you mean here in Oregon?" The Florida man said,
"No, that's what time it is here in Florida" The man from Oregon said,
"that's odd, that's exactly what time it here as well!" Both men were right. How
can this be?
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Answer 19 |
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| 12. A guy goes to bed at 10 o'clock. He plans to
sleep until 11 o'clock the next morning. He set his alarm clock, which does not know the
difference between AM or PM, to wake him at 11, and he fell asleep 25 minutes later. How
long did he sleep before the clock woke him up?
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Answer 19 |
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| 13. Harry had been gazing out of the window for
quite a while, watching the children at play out in the sunshine. "What's the time,
Sam?" he asked. "My watch is on the blink." His friend thought a moment.
"It's exactly six times as many minutes after the half hour as the hour hand is
minutes divisions before 12 o'clock," he replied. "So you say!!." Do you
know the answer?
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Answer 19 |
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| 14. A 24 hour clock :There are ten times as many
seconds in the hour as there are minutes left of the day. There are half as many minutes
left of the day as there shall be hours of the week left at the end of the day. Week runs
Sunday->Saturday. What time is it and what day?
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Answer 19 |
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15.
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Answer 19 |
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| 16. Consider the dates 9.11.99 or 11.9.99, depending on how you
write the date. Either way, Day * Month = Year, where the year is written as the last two digits. How many other days in the 20th century can you find that have this property?
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Answer 19 |
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| 17. At what time, between the hours of 12:00 noon
and 1:00 p.m. would the angle between the hour hand and the minute hand of a continuously
driven clock be exactly 180 degrees?
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Answer 19 |
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| 18. An alarm clock runs 4 minutes slow every hour.
It was set right 3.5 hours ago. Now another clock, which is correct, shows noon. In how
many minutes, to the nearest minute, will the alarm clock show noon?
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Answer 19 |
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| 19. A wall clock loses 2 minutes in an hour. A
table clock gets 2 minutes ahead of the wall clock in an hour. An alarm clock falls 2
minutes behind the table clock in an hour. A wristwatch gets 2 minutes ahead of the alarm
clock in an hour. At noon all four timepieces were set correctly. To the nearest minute,
what time will the wristwatch show when the correct time is 7:00 p.m.?
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Answer 19 |
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| 20. In a certain country, the temperature goes up
sharply in the day and down at night. This had an effect on my watch. I noticed it was 1/2
minute fast at nightfall, but at dawn it had lost 1/3 minute, making it only 1/6 minute
fast. One moring- May 1- my watch showed the right time. By what date was it 5 minutes
fast?
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Answer 19 |
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| 21. My watch is 1 second fast per hour and your
watch is 1.5 seconds slow per hour. Right now they show the same time. When will they show
the same time again? When will they show the same correct time again?
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Answer 19 |
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| 22. A watchmaker was telephoned urgently to make a
house call to replace the broken hands of a clock. He was sick, so he went to his
apprentice. The apprentice was thorough. When he finished inspecting the clock it was
dark. Assuming his work was done, he hurriedly attached the new hands and set the clock by
his pocket watch. It was 6 o'clock, so he set the big hand at 12 and the little hand at 6.
The apprentice returned, but the telephone rang. He picked up the phone only to hear the
client's angry voice: "You didn't do the job right. The clock shows the wrong time." Surprised, he hurried back to the client's house. He found the clock showing not much past eight. He handed his watch to the client, saying: "Check the time, please. Your clock is not off even by 1 second." The client had to agree. Early the next morning the client telephoned to say that the clock hands, apparently gone berserk, were moving around the clock at will. When the apprentice rushed over, the clock showed a little past seven. After checking with his watch, the apprentice got angry: "You are making fun of me! Your clock shows the right time!" What is going on?
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Answer 19 |
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| 23. You have to cook an egg for exactly 11
minutes. You have two hourglasses (which may not be placed on their side) that time 5
minutes and 7 minutes, when do you put the egg in the boiling water?
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Answer 19 |
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| 24. I have a clock which has to be reset every two
months, because it's way off. There's nothing wrong with it. About twice a year it can go
3 months without having to be reset. What kind of clock is this and why do I have to keep
reseting it?
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Answer 19 |
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| 25. As I entered the house, I heard the grandfather clock strike once. Half
an hour later, I heard it strike once again. Half an hour later, I heard it strike once again. Half an hour later, I heard it strike once again.
As I left the house half an hour later, I heard it strike once again. At what time did I enter the house.
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Answer 19 |
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| 26. With a 7 minute hour-glass and an 11 minute
hour-glass, how would you time the boiling of an egg for 15 minutes?
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Answer 19 |
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| 27.
Suppose you want to boil a nine-minute egg. If the only time-measuring devices are two
hourglasses (egg-timers), which measure four min. and seven min., is it possible? You
can't boil the egg for less than nine minutes, turn it off, and resume again for the
remainder of the necessary time. You must boil it all at once.
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Answer 19 |
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| 28. I have three clocks (A, B, C) which I
synchronized exactly to 12 o'clock noon yesterday (18-9-1999). Today at 12 noon, clock A
showed 12 o'clock, Clock B was 1 minute slow, and clock C was 1 minute fast. The clocks
will continue in the same manner. On what date will the three clocks again show 12 am at
the same moment?
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Answer 19 |
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| 29. If your watch reads quarter past six, what is the smaller angle between
the two hands?
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Answer 19 |
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| 30.
A man who lives on a hill top wakes up one morning to find to his horror
that his bulky grandfather's clock has stopped. Now the only other clock is the
monster town clock down the hill. He cant' take his clock down neither can
he bring the other clock up. Now he has to synchronise the two clocks. It
takes some definite time to go down the hill and some definite but
different from the former time to come back and to add to his plea he
does'nt know these two times. Can you help him synchronise the two clocks.
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Answer 19 |
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| 31.
I have a clock which displays the time. It's 12:55
Now I cover up the clock with a towel and wait
1 minute before I take of the towel, the time is now 12:56
Once again I cover up the clock and wait 2 minutes.
This time the clock shows 12:56 again.
A third time the clock is covered up with the towel and
after exactly 1 minutes the towel is removed and the clock
reveals 12:55. This is no trick and the clock has not been tampered with Did the time stood still? And did we go back in time? What is going on?
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Answer 19 |
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| 32.What will happen on 2nd febuary this year (2000) that hasn't happened since 28 august 888?
And why is August considered the last to have all of its *digits* even?
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Answer 19 |
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| 33. "D'you know something, Dad?" Tommy asked. "In twenty-four hours, how
many times is the minute hand at right angles to the hour hand?" Harry started winding back his watch. "I'll soon tell you," he said. The boy grinned. "That's not fair," he declared. "Can't you figure it
out in your head?" Well can you?
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Answer 19 |
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| 34.
You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), and a five-minute
timer can you boil the egg for only two minutes?
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Answer 19 |
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| 35.
A French saleswoman was in U.K. for business. She phoned a taxi company and booked a cab for a certain time. She pronounced the time correctly
and the English taxi company heard correctly but the taxi arrived 30 minutes early. What time did she book the taxi? What time did it arrive?
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Answer 19 |
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| 36.
How many times do symmetrical dates occur in one century?
Of the format: DD:MM:YY (including DD:M:YY)
e.g. 20:11:02 = 20th November 2002 and 12:1:21 12th January 2021.
Years starting nn00 to nn99 [e.g. 2000 to 2099]
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Answer 19 |
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| 37.
When can you add two to eleven and get one as the correct answer?
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Answer 19 |
A year is a leap year
if it is divisible by 4, unless the year is
divisible by 100, then it is NOT a leap year; unless the
year is divisible by 400, then it IS a leap year.
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