Brain Teaser 1. A 30 year old man married a 25 year old woman. She died at age 50 a nd her husband was so devastated that he cried for years. Ten y ears after he stopped crying, he died. If he had lived to be 80. How many years was he a widower?. www.mathsrevision.com.
A 30 year old man married a 25 year old woman.
She died at age 50 and her husband was so
devastated that he cried for years. Ten years after
he stopped crying, he died. If he had lived to be 80.
How many years was he a widower?
He was a widower for 25 years. !
If Susan is 10, Arabella is 20, and Jim
and Neal are both 5, but Richard is 10.
How much is Jennifer by the same system?
Jennifer is fifteen, in a system that awards
five for each syllable.
If 2 hours ago it was as long after
one o'clock in the afternoon as it was before
one o'clock in the morning.
What time would it be now?
Nine o'clock. Since there are 12 hours between
the 2 times and half of that time is six, then the
halfway mark would have to be 7 o'clock. If it were
7 o'clock, two hours ago, the time would now be
I am eight letters long - "12345678" My 1234 is an atmospheric condition. My 34567 supports a plant. My 4567 is to appropriate. My 45 is a friendly thank-you. My 678 is a name.
Q: What word am I?
They managed to catch one big fish,
one small fish and one fat fish. Since only
three fish were caught.
How is it possible that they each
took home a fish?
The fishing party consisted of three people.
A grandmother, a mother, and a daughter.
The mother is both a mother and a daughter.
If you were to put a coin into an empty
bottle and then insert a cork into the neck
How could you remove the coin without taking out the cork or breaking the bottle?
Simply push the cork into the bottle
and shake the coin out.
What is at the beginning of eternity,
the end of time,
the beginning of every end
and the end of every place?
A snail is at the bottom of a well 30 feet
deep. It crawls up 3 feet each day, but at
night, it slips down 2 feet.
How long does it take for the snail
to crawl out the well?
28 days. Once it reaches the top,
it does not slip down 2 feet.
You have a box which is more than large enough
to contain the object. You have several locks with keys. The box has a locking ring which is more than large enough to have a lock attached. But your friend does not have the key to any lock that you have. Note that you cannot send a key in an unlocked box, since it might be copied.
How is this done?
Attach a lock to the ring. Send it to her. She attaches her own lock and sends it back. You remove your lock and send it back to her. She removes her lock.
a 4-minute egg timer
and a 7-minute egg timer. You want to measure 9 minutes.
How do you do it?
Start both egg timers. When the 4-minute timer runs out, turn it over (4 minutes elapsed). When the 7-minute timer runs out, turn it over (7 minutes elapsed). When the 4-minute timer runs out this time (8 minutes elapsed), the 7-minute timer has been running for 1 minute. Turn it over once again. When it stops, 9 minutes have elapsed.
If there are fifteen crows on a fence
and the farmer shoots a third of them.
How many are left?
they all flew away with noise of the gun.
How much dirt is in a hole that is 3 ft deep
and 6 inches in diameter?
How many times can you subtract
the number 5 from 25?
After the first calculation,
you will be subtracting 5 from 20, then 5 from 15, and so on.
of a very tall building. Everyday he gets
the elevator down to the ground floor to leave the building to go to work. Upon returning from work though, he can only travel half way up in the lift and has to walk the rest of the way, unless it's raining! WHY?
The man was a dwarf and couldn't reach top liftbuttons except with an umbrella.
trousers, jumper, gloves, and balaclava.
He is walking down a black streetwith all the
street lamps off. A black car is coming
toward him with its lights off too, but
somehow manages to stop in time. How did the driver see the man?
It was day time.
Is half of two plus two
equal to two or three?
Three. It seems that it could almost be either,but if you follow the mathematical orders of operation,division is performed before addition. So... half of twois one. Then add two, and the answer is three.