HARD BRAIN TEASERS

Fun Facts (Hints)

Check out some interesting facts about how brain teasers actually effect our brains:
  • Keeping your brain active is important to keep it functioning well.
  • The practice of mental exercising may also protect against collection of detrimental proteins in the brains of individuals who have Alzheimer's disease.
  • Studies show that vast levels of mental exercise are connected to better brain function throughout a person's lifetime.
  • Significantly for elderly people, partaking in highly complex mental exercises in later life is associated with a lower chance of developing dementia.
  • Solving complex brain riddles and other activities like journal writing are good ways to stimulate your mind daily.
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    Hard Brain Teasers
    Really hard brain teasers are difficult to solve but are also very difficult to find in one place. Until now, that is. Our staff at Riddles and Answers has regularly updates this set of super challenging riddles to rack your brain!

    These brain teasers are very high in difficulty and have the solutions provided for when you feel like you've had enough.

    Now you have a chance to prove just how clever you really are! Pit your brain against some of most challenging puzzles you can find, anywhere.

    Also, be sure to check back regularly to continue to challenge yourself habitually with these great brain teasers. The more that you exercise your brain with puzzles and questions like the ones provided, the sharper your mind will be throughout each day.

    Fox Goose Beans Riddle

    Hint:
    The first step must be to take the goose across the river, as any other will result in the goose or the beans being eaten. When the farmer returns to the original side, he has the choice of taking either the fox or the beans across next. If he takes the fox across, he would have to return to get the beans, resulting in the fox eating the goose. If he takes the beans across second, he will need to return to get the fox, resulting in the beans being eaten by the goose. The dilemma is solved by taking the fox (or the beans) over and bringing the goose back. Now he can take the beans (or the fox) over, and finally return to fetch the goose. His actions in the solution are summarized in the following steps: Take the Goose over Return Take the beans over Return with the goose Take the fox over Return Take goose over Thus there are seven crossings, four forward and three back.
    Did you answer this riddle correctly?
    YES  NO  

    3 Gallon Jug And 5 Gallon Jug

    Hint:
    Fill the 5-jug up completely. There will be, of course, 5 gallons in the 5-jug. You must fill all the gallons up to the top, otherwise you don't actually know how much you have.

    Use the water from the 5-jug to fill up the 3-jug. You're left with 3 gallons in the 3-jug and 2 gallons in the 5-jug.

    Pour out the 3-gallon jug. You're left with nothing in the 3-jug and 2 gallons in the 5-jug.

    Transfer the water from the 5-jug to the three jug. You're left with 2 gallons in the 3-jug. And nothing in the 5-jug.

    Fill up the 5-jug completely. You now have 2 gallons in the 3-jug and 5 in the 5-jug. This means that there is 1 gallon (3.8 L) of space left in the 3-jug.

    Use the water from the 5-jug to fill up the 3-jug. Fill up the last gallon of space in the 3-jug with the water from the 5-jug. This leaves you with 3 gallons in the 3-jug, and 4 gallons in the 5-jug.

    Fill the 3-jug completely with water. You now have 3 gallons (11.4 L) of water.

    Transfer this water into the 5-jug. You now have nothing in the 3-jug, and 3 gallons (11.4 L) in the 5-jug.

    Re-fill the 3-jug with water. You now have 3 gallons (11.4 L) in the 3-jug and 3 gallons in the 5-jug.

    Fill the 5-jug with water from your 3-jug. You now have 1 gallon (3.8 L) in the 3-jug and 5 gallons (18.9 L) in the 5-jug. This is because, in the last step, you only had 2 gallons (7.6 L) of space left over, so you could only pour 2 gallons.

    Pour out the 5-jug and refill it with your 1 gallon. You now have nothing in the 3-jug and 1 gallon in the 5-jug

    Fill up the 3-jug. You now have 3 gallons (11.4 L) in the 3-jug and 1 in the 5-jug.

    Transfer the 3 gallons (11.4 L) of water into the 5-jug to end up with 4 gallons (15.1 L). Simply pour over your three gallons into the 5-jug, which only had 1 gallon (3.8 L) in it previously. 1+3=4, and a successfully defused bomb.
    Did you answer this riddle correctly?
    YES  NO  

    Borrow $50 From Mom And $50 From Dad Riddle

    Hint:
    Total Money taken = $100($50+$50)

    Now,

    Bag's Price = $ 97

    Remaining Amount = $100 - $97

    = $ 3

    Returned = $ 1 + $ 1

    =$2

    In pocket = $1

    Total money owed = $100- ( Returned amount)

    = $98( Bag's amount and reserved amount)

    So, it was a calculation mistake.
    Did you answer this riddle correctly?
    YES  NO  

    A Dash At 20 And A Dot At 60

    Hint: It's not a clock.
    During Morse code
    Did you answer this riddle correctly?
    YES  NO  

    Hard To Find Riddle

    Hint:
    Talent
    Did you answer this riddle correctly?
    YES  NO  

    Difficult To Trick Python Riddle

    Hint:
    Because they only really have three main thoughts; 'Can I mate with it, will it hurt me or can I eat it?'
    Did you answer this riddle correctly?
    YES  NO  

    Hangs On The Wall And Falls Riddle

    Hint:
    A Barometer
    Did you answer this riddle correctly?
    YES  NO  

    Shoe Man Whistle

    Hint:
    The third equation has a term with a pair of whistles. The last line involves a single whistle.

    Furthermore, the man in the second and third lines are wearing a whistle, but the man in the last line is not wearing a whistle. Presumably the value of the whistle should be accounted for to get the correct answer.

    The pictures can be translated into the following equations:

    shoes + shoes + shoes = 30
    shoes + (man + whistle) + (man + whistle) = 20
    (man + whistle) + 2(whistles) + 2(whistles) = 13
    shoes + (man) x (whistle) = ?

    From the first equation we can solve for the shoes value:

    shoes + shoes + shoes = 30
    3(shoes) = 30
    shoes = 10

    We can then solve the second equation for the (man + whistle) value:

    shoes + (man + whistle) + (man + whistle) = 20
    10 + 2(man + whistle) = 20
    2(man + whistle) = 10
    man + whistle = 5

    Then we solve the third equation for the whistle:

    (man + whistle) + 2(whistles) + 2(whistles) = 13
    5 + 4(whistles) = 13
    4(whistles) = 8
    whistle = 2

    We also need to solve for the value of the man:

    man + whistle = 5
    man + 2 = 5
    man = 3

    Now we can evaluate the final expression, remembering the order of operations that multiplication should be evaluated before addition:

    shoes + (man) x (whistle) = ?

    10 + 3 x 2
    = 10 + 3 x 2
    = 10 + 6
    = 16
    Did you answer this riddle correctly?
    YES  NO  

    Playing With A Book Riddle

    Hint:
    10. Remember pages of a book are double-sided.

    7+8, 99+100, 101+102, 221+222, 223+224s.
    Did you answer this riddle correctly?
    YES  NO  

    The Older Twin Brother

    Hint:
    It's all because the clocks went back. Samuel Peterson was born on 1.39am on Sunday, November 6. His brother Ronan, meanwhile, was born 31 minutes later, but by then daylight saving hours had ended, and the clock was turned back one hour.

    So while Ronan was in a sense born at 2:10 am on November 6, his official time of birth is actually 1:10 am.
    Did you answer this riddle correctly?
    YES  NO  

    Post Your Hard Brain Teasers Below

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