SOLUTIONS TO THE NEURODYNAMIC TEASERS & FLEXORS

[continue from the Last Post]

SOLUTION TO TEASER #1:

Start by burning one of the two strings at both ends, and the other string at one end.

Since each string takes one hour to burn up, the string that has been lit at both ends must be consumed in half an hour (30 minutes). At this point, the other string has also been burning for 30 minutes. It has 30 minutes of life remaining.

Now light up the unlit end of this string. When it meets the initially burning other end, half of 30 minutes will have elapsed, that is, 15 minutes. This gives us the initial 30 minutes plus these additional 15 minutes = 45 minutes.

SOLUTION TO TEASER #2:

One possibility is to set fire to the ground you’re standing on.

Since the wind is blowing towards you, let it blow the fire away from you for a while, then start walking towards it. By the time the main fire gets to where you were, there will be no grass or trees left to burn. It will eventually sputter out.

SOLUTION TO TEASER #3:

One weighing! Place on the scale one coin from the first stack, two from the second, three from the third, and so forth.

You know how much the coins on the scale should weigh if none of them were counterfeit. Therefore to determine which stack is counterfeit, look at the weight and figure out how much heavier it weighs. The number will correspond to the stack from which that group of coins came.

For example, if it’s four grammes heavier, the fourth stack is counterfeit because you placed four of its coins on the scale.

[To be continued in the Next Post. Excerpted from the Braintertainment segment of 'Unleashing Genius with the World's Most Powerful Learning Systems', by Dilip Mukerjea. All the images in this post are the intellectual property of Dilip Mukerjea.]