Have you received one of our 'Brain Exercise' cards and you're keen to check your answer? Or are you a fan of puzzles and conundrums? Whatever your reason  welcome!
Here you'll find some brain teasers, logic problems, greycell stimulus, and more... all aimed at exercising your brain and switching your ThinkingOn (see what we did there?!).
Below each puzzle is its solution. And if you're interested in other ways to advance your mental faculties then drop us a line!
Here you'll find some brain teasers, logic problems, greycell stimulus, and more... all aimed at exercising your brain and switching your ThinkingOn (see what we did there?!).
Below each puzzle is its solution. And if you're interested in other ways to advance your mental faculties then drop us a line!
CLICK HERE FOR SOLUTION
Answer: D Explanation: All the figures provided in the options are present in the 'collection', as reflections or reorientations, except for D. At first sight it might seem identical to the figure in the first columnsecond row, but close examination would reveal that it has 5 teeth instead of 4 teeth. 
Move 4 matchsticks to make 10 Squares.
(Not all the matches need to be flat on the surface and squares don't have to be the same size.) 
How many randomly selected people would you need in a group, for there to be a 50–50 chance that two of them share a birthday?
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Answer = 23 This feels counterintuitive (most people guess an answer over 50), but it illustrates how bad we are at naturally multiplying exponents of probability. For a full explanation of the answer see: https://en.wikipedia.org/wiki/Birthday_problem For lots more explanation about how our decisionmaking is flawed read 'Thinking Fast, and Slow' by Daniel Kahneman 
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You’re in second place. You’ve simply replaced someone in the secondplace spot. To be in first place, you’d have to overtake the firstplace person. This simple puzzle can trip us up because our 'fast' brain picks up the 'second place' statement, and jumps to the erroneous conclusion that we've moved into first place. 
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If you take the first answer that pops into you're head you might well be wrong. If you guessed 12 days, that's your 'fast brain' taking over, and giving the wrong answer! The correct answer 23 days, since the patch doubles every day, it would only take one day to go from half covered to fully covered. For more on the fast, and slow brain read the book by Daniel Kahneman 
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Assign the switches with numbers 1, 2 and 3. Leave switch 1 off. Turn switch 2 on for one minute, then turn it off. Turn on switch 3 and leave it on. Leave the start room immediately and check on the bulbs:

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7 Add together the two numbers at the top of each square to give the two digit number at the bottom of the square. 
Four legionnaires have been buried up to their necks in the ground as a punishment (see picture). They can’t move – they can only look forward.
Between A and B is a brick wall which is completely opaque (they can’t see through it).
They are all aware that each of them is wearing a hat: two are wearing black hats, two are wearing white hats. But they don’t know what colour hat they themselves are wearing.
The sergeant tells them they can end their punishment if one of them correctly calls out the colour of his own hat. But they only get one go, and if they get it wrong their punishment will double in length.
They can’t talk to each other and have only 10 minutes to work it out.
After 60 seconds, one of them calls out the right answer. Who?
Between A and B is a brick wall which is completely opaque (they can’t see through it).
They are all aware that each of them is wearing a hat: two are wearing black hats, two are wearing white hats. But they don’t know what colour hat they themselves are wearing.
The sergeant tells them they can end their punishment if one of them correctly calls out the colour of his own hat. But they only get one go, and if they get it wrong their punishment will double in length.
They can’t talk to each other and have only 10 minutes to work it out.
After 60 seconds, one of them calls out the right answer. Who?
CLICK HERE FOR SOLUTION
Prisoner C
Explanation: The prisoners know that there are only two hats of each colour.
If B and C have hats of the same colour, then D would deduce that his own hat is the opposite colour, and call it out correctly.
However, since B and C have different coloured hats, then D can say nothing.
Prisoner C therefore, after allowing an appropriate interval for D to answer (based on the reasoning above), deduces from D's silence that B and C must be wearing different hats. Since C can see B's hat, he can predict his own hat's colour.
For more on this particular logic puzzle click here.
Explanation: The prisoners know that there are only two hats of each colour.
If B and C have hats of the same colour, then D would deduce that his own hat is the opposite colour, and call it out correctly.
However, since B and C have different coloured hats, then D can say nothing.
Prisoner C therefore, after allowing an appropriate interval for D to answer (based on the reasoning above), deduces from D's silence that B and C must be wearing different hats. Since C can see B's hat, he can predict his own hat's colour.
For more on this particular logic puzzle click here.