When it's bad luck to meet a black cat?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

It is always ahead of me yet I can never see it. What is it?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What does this rebus mean?

O
N
C
E
TIME

Our product and our sum always give the same answer. Who are we?

Can you solve below mathematical equation?

2^1234 - 2^1233