WHAT IS EVEN SMARTER THAN TALKING RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

A person: ("Legs" is a metaphor for hands and knees in the first description and two legs and a cane in the last.) Did you answer this riddle correctly?
YES  NO  

You and your shadow. Did you answer this riddle correctly?
YES  NO  

This problem can be best solved using the pigeonhole principle.

The argument will go like this:
Assume that all the non-bald people in NYC have different number of hairs on their head. The population is about 9 million and let us assume that there are 8 million among them who are not bald.

Now, those 8 million people need to have different number of hairs. On an average, people have just 100, 000 hairs on their head. If we keep on assuming that there is someone with just one hair, someone with two, someone with three and so on, there will be 7, 900, 00 other people left who will have more than 100, 000 hairs on their head and need different number of hairs.

Now, as per this assumption, if we keep increasing one hair for each person, to make everybody hair different in numbers, we will come across someone with 8, 000, 000 hairs. But that is practically impossible (even 1, 000, 000 is impossible). Thus there must be two people who are having same number of hairs. Did you answer this riddle correctly?
YES  NO  

The couple is either a man and his daughter or an uncle and his niece. Did you answer this riddle correctly?
YES  NO  

"World War I" was named after after "World War II" Did you answer this riddle correctly?
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He lived in a lighthouse. When he woke up he looked out the window. To his horror he saw a shipwreck, which was his fault for leaving the light off. He killed himself out of guilt. Did you answer this riddle correctly?
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The Wave Did you answer this riddle correctly?
YES  NO  

The wick of a candle. Did you answer this riddle correctly?
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A shield Did you answer this riddle correctly?
YES  NO  

We know from (3) that the youngest person was not the victim, from (4) that the youngest person was not the helper and from (6) that the youngest person was not the killer. The youngest person can only have been the witness therefore. If we make up a chart there are now three possible combinations:

Oldest person (father) H H M

Next to oldest (mother) V M H

Next to youngest (son) M V V

Youngest (daughter) W W W

(H = Helper ; V = Victim ; M = Murderer ; W = Witness)

We can work out from (5) that the father was the oldest, from (2) that the youngest person must have been the daughter. Therefore the next to the youngest must have been the son and the next to the oldest, the mother.

Of three possibilities: the first is impossible (from (3) the youngest person and the victim were of different sexes); the third is also impossible (from (1) the witness and the helper were of different sexes). Therefore only the second possibility holds and the mother was the murderess Did you answer this riddle correctly?
YES  NO  

She shot her husband with her camera and then developed the picture. Did you answer this riddle correctly?
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Susy can fill the sink and watch it drain. When the water reverses direction when going down the drain, she will know they have crossed the equator. Did you answer this riddle correctly?
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He was David Did you answer this riddle correctly?
YES  NO  

3, 3, and 8. The only groups of 3 factors of 72 to have non-unique sums are 2 6 6 and 3 3 8 (with a sum of 14). The rest have unique sums:

2 + 2 + 18 = 22
2 + 3 + 12 = 18
2 + 4 + 9 = 15
3 + 4 + 6 = 13

The house number alone would have identified any of these groups. Since more information was required, we know the sum left the answer unknown. The presence of a single oldest child eliminates 2 6 6, leaving 3 3 8 as the only possible answer. Did you answer this riddle correctly?
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He was genius.

Officials must have thought he was jumping with a hostage, they would never risk giving him a faulty parachute. Did you answer this riddle correctly?
YES  NO