Brain Teasers # 15 - Twins

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be?

Post the answer if you know it.

In the meanwhile, here is the solution to yesterdays' puzzle.

Answer: Electric trains don't produce smoke!

Cheers!

 

Brain Teasers # 14 - Train

An electric train travelled from London due North to Manchester, at exactly 60 miles per hour. There was a strong wind blowing from the East at exactly 30 miles per hour. In which direction did the smoke blow?

Post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle.

Answer: Throw it in the air !!

Cheers!

Brain Teasers # 13 - Ball

How can you throw a ball so that it goes a short distance, comes to a total stop, reverses its motion, and then goes the opposite way. You are not allowed to bounce it against anything, hit it with anything, or tie it to anything. 

Post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle:

Answer:
Turn the grid upside down::-)  

Cheers!

Brain Teasers # 12 - Circle Numbers

Can you circle exactly four of these numbers such that the total is twelve?

Post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle.


Answer: Keep the first bulb switched on for a few minutes. It gets warm, right? So all you have to do then is ... switch it off, switch another one on, walk into the room with bulbs, touch them and tell which one was switched on as the first one (the warm one) and the others can be easily identified :-) 

Brain Teasers # 11 - Bulbs

There are three switches downstairs. Each corresponds to one of the three light bulbs in the attic. You can turn the switches on and off and leave them in any position. 

How would you identify which switch corresponds to which light bulb, if you are only allowed one trip upstairs?

Post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle.

Answer: Change one of the + into a 4: 5 + 545 = 550.

Brain Teasers # 10 - Equation

Puzzle:

Add a single straight line to make this equation true - the equals sign remains untouched.

5 + 5 + 5 = 550

Post the answer if you know it.


In the meanwhile, here is the solution to yesterday's puzzle:

Answer: No-one, an only son cannot have a brother, although they may have a sister. 

Cheers!

Brain Teasers # 9 - Family

Puzzle:

Who is your father's only son's brother's uncle's wife's daughter's brother's father's son?

Post your answer if you know it.


In the meanwhile, here is the solution to yesterday's puzzle.

Answer: None: polar bears live at the north pole and penguins live at the south pole! 

Cheers!

Brain Teasers # 8 - Polar Bear and Penguin

Assume that penguins live with a density of 1,000 penguins per square mile and can run at an average speed of 7 miles per hour on land and swim at 20 miles per hour. Also assume that a polar bear has a territory of 10 square miles, can run at 25 miles per hour and swim at 10 miles per hour, how many penguins will an average polar bear eat in any given month, remembering that a polar bear could, as a maximum, only eat one penguin per hour and 7% of the land is next to the sea.

Please post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle:
Answer: Still 9 feet because the ladder will rise with the ship! 

Cheers!

Brain Teasers # 7 - Rope Ladder

A ship is docked in the harbour. Over the side hangs a rope ladder with rungs a foot apart. The tide rises at a rate of 9 inches per hour. At the end of six hours, how much of the rope ladder will still remain above water, assuming that 9 feet were above the water when the tide began to rise?

Please post  the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle.

Answer: Antelope: move it from the end to the beginning, the initial letters will then spell ALPHABET. 

Cheers!

Brain Teasers # 6 - Sequence

Change the position of just one of the words below so that all the words are in an alphabetical sequence:

llama phoenix hyena alligator beaver elephant tortoise antelope

Please post the answer if you know it.

In the meanwhile, here is the solution to yesterday's puzzle:

Answer: Simply take the second glass and pour the orange into the fifth glass.

Cheers!

Brain Teasers # 5 - Drink

Below you will see six glasses. Three of these glasses contain orange. Moving only ONE glass, can you arrange the glasses such that those containing the orange are together? 

Please post your answer to this if you know it. The solution will be announced tomorrow.

In the meanwhile,  here is the solution to yesterday's puzzle on the Family Photo.

Answer: Four children (2 boys and 2 girls), their mother and father, the mother's mother, and the father's father.

Cheers!

Brain Teasers # 4 - Family Photo

A family photo contained:

one grandfather, one grandmother,
two fathers, two mothers,
six children, four grandchildren,
two brothers, two sisters,
three sons, three daughters,
one father-in-law, one mother-in-law, one daughter-in-law.

29 people you may think, but no! What is the fewest number of people that could have been in the photo?

Please post your answer if you can solve this. The answer to this puzzle will be announced tomorrow.

In the meanwhile, here is the solution to yesterday's puzzle:

Take the she-goat to the other side. Go back, take cabbage, unload it on the other side where you load the she-goat, go back and unload it. Take the wolf to the other side where you unload it. Go back for the she-goat. That's it. 

Cheers!

Brain Teasers # 3 - She-goat, Wolf and Cabbage

A farmer returns from the market, where he bought a she-goat, a cabbage and a wolf (what a crazy market:-). On the way home he must cross a river. His boat is small and won't fit more than one of his purchases. He cannot leave the she-goat alone with the cabbage (because the she-goat would eat it), nor he can leave the she-goat alone with the wolf (because the she-goat would be eaten). How can the farmer get everything on the other side 

Post your answers if you can solve this. The answer will be announced tomorrow.

In the meanwhile, here is the solution to yesterday's puzzle

Answer: 12 + 6 + 1 = 19.

Note that the puzzle didn't ask for three digits to be circled!

Cheers!

Brain Teasers # 2 - Three numbers

Can you circle exactly three numbers to make a total of 19?

Solution to this puzzle will be announced tomorrow.

In the meanwhile, here is the answer to yesterday's puzzle:

We have to be careful what we are adding together. Originally, they paid £30, they each received back £1, they now have only paid £27. Of this £27, £25 went to the manager for the room and £2 went to the bellboy.

Cheers!

Brain Teasers # 1 - Adding numbers

Have been tied up with a few other things, so could not really catch up on the daily updates on my blog. Anyway, it is better late than never, and so I will start from today.

Shall we solve some puzzles this month? Here is the first one.

Three people check into a hotel. They pay £30 to the manager and go to their room. The manager suddenly remembers that the room rate is £25 and gives £5 to the bellboy to return to the people. On the way to the room the bellboy reasons that £5 would be difficult to share among three people so he pockets £2 and gives £1 to each person. Now each person paid £10 and got back £1. So they paid £9 each, totalling £27. The bellboy has £2, totalling £29. Where is the missing £1?

Try your hand with this, and post your answers if you can solve it.

Solution to this puzzle will be announced tomorrow :)

 

Cheers!