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Logic riddles & Logical questions

Collection of various types of logical riddles and answers, also tricky logical questions with details.

Crossing the lake riddle

Riddle question:

There are four people in an adventure race that need to get across a lake. They have a small canoe. The rules say that only the slowest person in the canoe can paddle, only one or two can be in the canoe at a time, and they must all cross in the canoe. From practice, they know that:

Ann can paddle across in 1 minute.

Bill can paddle across in 2 minutes.

Sue can paddle across in 5 minutes.

Mike can paddle across in 10 minutes.

How do they get everyone across the river in the fastest time without breaking the rules?

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A barber & logician riddle

Riddle question:

A man was in a small town for the day, and needed a haircut. He noticed that there were only two barbers in town, and decided to apply a bit of logical deduction to choosing the best one. Looking at their shops, he saw that the first one was very neat and the barber was clean shaven with a nice haircut. The other shop was a mess, and the barber there needed a shave and had a bad cut besides. Why did the man choose to go to this barber?

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Short logic riddles

Riddles:
  1. Why can't a man living in the USA be buried in Canada?
  2. Is it legal for a man in California to marry his widow's sister? Why?
  3. A man builds a house rectangular in shape. All the sides have southern exposure. A big bear walks by. What color is the bear? Why? (similar to the Bear riddle in the section Einstein's Riddles)
  4. If there are 3 apples and you take away 2, how many do you have?
  5. How far can a dog run into the woods?
  6. One big hockey fan claimed to be able to tell the score before any game. How did he do it?
  7. You can start a fire if you have alcohol, petrol, kerosene, paper, candle, coke, a full matchbox and a piece of cotton wool. What is the first thing you light?
  8. Why do Chinese men eat more rice than Japanese men do?
  9. What word describes a woman who does not have all her fingers on one hand?

Answers:

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Teaser - What song?

Question

A man is sitting in a pub feeling rather poor. He sees the man next to him pull a wad of £50 notes out of his wallet.
He turns to the rich man and says to him,
"I have an amazing talent: I know almost every song that has ever existed."
The rich man laughs.
The poor man says, "I am willing to bet you all the money you have in your wallet that I can sing a genuine song with a lady's name of your choice in it."
The rich man laughs again and says, "Ok how about my daughters name, Joanna Armstrong-Miller."
The rich man goes home poor. The poor man goes home rich.

What song did he sing?
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Its waistline is a hexagon

Question

Heart of Darkness,
Coat of Grain,
Was once alive,
Now feels no pain,
Never walks, but
Leaves a Trail.
Circle head and pointed tail.
Grows shorter as the day goes on-
Its waistline is a hexagon.

What am I?
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