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POW: 06-04-2018

Riddle:

Jack has 8 bricks 7 of them weights the same amount and one is slightly heavier. Using a balance scale, how can Jack find the heavier brick in two weighings?

Answer:

First he split them in to piles of 3, 3, and 2 bricks. Then he weighs both groups of 3 with each other. If they balance he knows the brick is one of the 2 unweighed bricks and he can weigh them to find the heaver one. If the the stacks of 3 bricks do not balance, he will weigh 2 of the 3 bricks. If they balance he will know the brick left unweighed is heavier, or if they do not balance, he will find the heavier one.

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POW: 05-28-2018

Riddle:

I'm a god, a planet, and measurer of heat.


Who am I?

Answer:

Mercury.

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Riddle:

A man has Ten Horses and nine stables as shown here. [] [] [] [] [] [] [] [] [] The man wants to fit Ten Horses into nine stables. How can he fit Ten horses into nine stables?

Answer:

One letter for each stable. [T][E][N] [H][O][R][S][E][S]

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POW: 05-14-2018

Riddle:

A man told his son that he would give him $1000 if he could accomplish the following task. The father gave his son ten envelopes and a thousand dollars, all in one dollar bills. He told his son, "Place the money in the envelopes in such a manner that no matter what number of dollars I ask for, you can give me one or more of the envelopes, containing the exact amount I asked for without having to open any of the envelopes. If you can do this, you will keep the $1000." When the father asked for a sum of money, the son was able to give him envelopes containing the exact amount of money asked for. How did the son distribute the money among the ten envelopes?

Answer:

The contents or the ten envelopes (in dollar bills) should be as follows: $1, 2, 4, 8, 16, 32, 64, 128, 256, 489. The first nine numbers are in geometrical progression, and their sum, deducted from 1,000, gives the contents of the tenth envelope.

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POW: 05-07-2018

Riddle:

Lily is a lillypad in a small pond. Lilly doubles her size each day, On the 20th day she cover the whole pond. On what day was Lily half the size of the pond?

Answer:

Day 19, it's not 10 because on day 20 she doubled from day 19, so 19 must be half the size of the pond.

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To see more past Problem of the Week's refer to the Riddles Newsletter annals.

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