What question can you never answer yes to?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

What Deficiency does the below rebus represent?

VIT_MIN

What can you hold in your right hand, but never in your left hand?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M