Brain Teaser SMS

Three closed boxes have either white marbles, black marbles or both, and they are labeled white, black and both. However, you’re told that each of the labels are wrong. You may reach into one of the boxes and pull out only one marble. Which box should you remove a marble from to determine the contents of all three boxes?

Answer:

The one labeled both. Since you know it’s labeled incorrectly, it must have all black marbles or all white marbles. After you determine what it contains, you can identify the other two boxes by the process of elimination.

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There is a room with no doors, no widows, nothing and a man is hung from the ceiling and a puddle of water is on the floor. How did he die?

Answer: He was standing on a block of ice and it melted.

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What ends in a ‘w’ but has no end?

Answer: A rainbow!

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An 18-wheeler is crossing a 4 kilometer bridge that can only support 10,000 kilograms and that’s exactly how much the rig weighs. Halfway across the bridge a 30 gram sparrow lands on the cab, but the bridge doesn’t collapse. Why not?

Answer: Since the bridge is 4 kilometers long, the halfway point would be 2 kilometers. The 18-wheeler would have used much more than 30g of fuel to drive 2 kilometers.

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If:
2 3 = 10
7 2 = 63
6 5 = 66
8 4 = 96
9 7 = ??

Answer:

f(n,m) = (n + m) * n
e.g. f(2,3) = (2 + 3) * 2 = 10
Hence, f(9,7) = (9 + 7) * 9 = 144.

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