What is the word or phrase?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Which is the smallest number that you can write using all the vowels exactly once?

What word is represented by this rebus?

Can you find the mistake in the below statement?

Solve below rebus puzzle?

A sundial has the fewest moving parts of any timepiece. Which has the most?